Supply Single-Blade Razor Review: Old-School Barbershop at Home

I’ve tested over 300 razors in 23 years of wet shaving, and the Supply Single-Edge razor is the first modern razor that genuinely captures that old barbershop single-edge experience without the vintage quirks. If you’ve been curious about injector-style razors but intimidated by hunting down 1950s Schicks on eBay, this is your entry point.

The Supply razor reimagines the classic single-edge injector design with modern materials, interchangeable base plates, and readily available blades. After three months of daily shaves, I’m convinced this is the best introduction to single-edge shaving for anyone who’s mastered a double-edge safety razor and wants something different.

What Makes the Supply Razor Different

Single-edge razors use thicker, stiffer blades than traditional double-edge razors. The Supply uses proprietary blades that measure roughly twice the thickness of a DE blade, which fundamentally changes how the razor cuts. There’s less blade flex, more structural support, and a completely different feel against your face.

The razor itself is machined from aerospace-grade aluminum or stainless steel, depending on which version you choose. I tested the stainless steel model—it has genuine heft at 3.4 ounces, balanced perfectly for my grip. The knurled handle provides excellent control even with wet hands and lathered fingers.

The Three-Plate System

Supply includes three interchangeable base plates with different blade gaps:

• Sensitive plate (0.5mm gap): Ultra-mild, perfect for daily shaving or beginners
• Regular plate (0.7mm gap): The sweet spot for most shavers, similar to a Merkur 34C in aggression
• Aggressive plate (0.9mm gap): For thick beards or multiple days’ growth

Swapping plates takes about 10 seconds. Unscrew the handle, pop out the old plate, drop in the new one, reassemble. I keep the regular plate installed 90% of the time, but I appreciate having options when I’ve skipped a day or two.

How It Shaves: My Three-Month Testing Experience

The first shave with the Supply took concentration. Single-edge razors require a steeper angle than DE razors—roughly 30 degrees instead of the typical 20-25 degrees. Hold the razor too shallow and you’ll get nothing but irritation. Find the right angle and you’ll hear that distinctive cutting sound that tells you you’re doing it right.

After a week of daily shaves, the technique became automatic. The blade rigidity means you can apply slightly more pressure than with a DE razor without causing irritation. Not that you should mash it into your face, but there’s more forgiveness than the internet wisdom suggests.

Efficiency and Closeness

With the regular plate, I consistently get a two-pass BBS (baby-smooth) shave with zero irritation. My routine: one with-the-grain pass, one across-the-grain pass, done. The aggressive plate can get there in a single pass if I’m careful, but that’s pushing my luck on daily shaves.

Compared to my Merkur 34C double-edge razor, the Supply feels more efficient per stroke. I make fewer passes to achieve the same closeness. Compared to my vintage Schick injectors, the Supply is slightly less aggressive but more predictable—there’s less variation between individual razors since these are CNC-machined rather than stamped.

Supply Razor vs. Traditional Options: The Numbers

Feature	Supply Single-Edge	Vintage Schick Injector	Standard DE Razor
Blade Availability	Readily available online	Limited, often out of stock	Everywhere, unlimited variety
Initial Cost	$75-$135	$15-$50 (used)	$30-$100
Per-Blade Cost	$0.50-$0.75	$0.60-$1.00	$0.10-$0.50
Learning Curve	Moderate (1 week)	Moderate (1 week)	Easy (2-3 days)
Adjustability	3 interchangeable plates	None (fixed)	Varies by model
Durability	Lifetime (modern machining)	Excellent (70+ year track record)	Excellent (varies)

Blade Performance and Longevity

Supply’s proprietary blades are rebranded Schick injector blades with a black coating. I typically get 5-7 comfortable shaves per blade before I notice tugging. That’s right in line with my experience with premium Feather double-edge blades, though the Supply blades cost more per unit.

The blade changing system is clever—you slide the old blade out through the bottom and insert the new one from the top. No touching sharp edges, no fumbling with wrappers. It takes about 5 seconds once you’ve done it a few times.

What About Third-Party Blades?

Yes, you can use generic Schick injector blades or Personna injector blades in the Supply razor. I tested both. The Personna blades gave me slightly smoother shaves but didn’t last quite as long. The generic Schick blades were nearly identical to Supply’s branded blades—likely because they’re the exact same blades.

Build Quality and Design Details

The stainless steel version I tested shows zero wear after three months of daily use and multiple drops onto tile floors. The machining tolerances are tight—there’s no blade rattle, no wobble, no gaps in the assembly. This feels like a precision tool, not a shaving gadget.

The handle length is 3.5 inches, which works for most hand sizes. I have larger hands and would prefer another half-inch, but it’s never caused control problems. The weight distribution puts most of the mass in the head, which helps the razor do the work without extra pressure.

The Aluminum vs. Stainless Decision

Supply offers both materials at different price points. The aluminum version weighs 0.7 ounces versus the stainless steel’s 3.4 ounces. I strongly prefer the stainless steel version—the extra weight provides better feedback and requires less concentration to maintain the correct angle.

If you have wrist issues or prefer ultra-lightweight razors, the aluminum makes sense. For everyone else, spend the extra $35 for stainless steel. It’s worth it.

Who Should Buy the Supply Razor

This razor excels for shavers who:

• Already use a double-edge safety razor comfortably and want to try single-edge shaving
• Have thick or coarse facial hair that benefits from more rigid blades
• Appreciate the option to adjust aggression without buying multiple razors
• Want a modern razor with lifetime durability and readily available parts
• Enjoy the ritual of wet shaving and don’t mind a slightly steeper learning curve

This is not the razor for absolute beginners. If you’ve never used a safety razor, start with a standard Edwin Jagger DE89 double-edge razor. Master that for six months, then consider the Supply if you want something different.

The Downsides Worth Mentioning

After three months, here’s what bothers me:

Blade cost: At roughly $0.60 per blade, you’re paying 3-6 times more than quality DE blades. Over a year of daily shaving, that’s an extra $40-$60. Not devastating, but worth considering.

Limited blade variety: With DE razors, you can try 50 different blade brands to find your perfect match. With the Supply, you’ve got maybe 3-4 options, all variations of the same basic Schick injector blade design.

The learning curve is real: My first three shaves produced more irritation than I’d had in years. The angle is critical, and it’s different enough from DE razors that muscle memory works against you initially.

Maintenance and Long-Term Ownership

I clean the Supply razor after every shave—rinse thoroughly under hot water, shake dry, and leave it disassembled overnight. Once a week, I do a deeper clean with an old toothbrush and dish soap to remove any soap scum buildup in the blade channel.

The stainless steel version requires zero special care. No polishing, no rust prevention, no coating to preserve. Rinse and forget. That’s the beauty of modern materials applied to traditional designs.

Supply offers a lifetime warranty against manufacturing defects. In 23 years of wet shaving, I’ve learned that warranty quality matters less than product quality—if you never need the warranty, it doesn’t matter how generous it is. But it’s reassuring to know they stand behind the product.

Frequently Asked Questions

Can you use regular injector blades in the Supply razor?

Yes, absolutely. The Supply razor accepts any standard injector-style blade, including Schick, Personna, and generic Chinese-made blades. Supply’s own branded blades are just rebranded Schick injectors. I’ve tested multiple brands and all work fine, though blade quality varies between manufacturers.

Is the Supply razor more aggressive than a Merkur 34C?

With the regular plate installed, the Supply feels slightly more efficient but not more aggressive. The thicker blade creates a different sensation—you feel more blade rigidity but less actual blade exposure. With the aggressive plate, yes, it’s definitely more aggressive than a 34C. With the sensitive plate, it’s milder.

How long does one blade last in the Supply razor?

I consistently get 5-7 comfortable daily shaves per blade. Some people report 8-10 shaves, but I notice tugging around day 6 and prefer to change blades before they get uncomfortable. Your mileage will vary based on beard coarseness and technique.

What’s the best shaving cream to use with the Supply razor?

The Supply performs well with any quality traditional shaving cream or soap. I primarily use it with Proraso Red and Taylor of Old Bond Street Sandalwood. The thicker blade design doesn’t clog as easily as DE razors, so it actually handles thicker lathers better than many double-edge razors.

Is the aluminum or stainless steel version better?

The stainless steel version provides better shaves for most users. The extra weight helps maintain the correct angle and provides better feedback. The aluminum version works fine if you have wrist issues or specifically prefer lightweight razors, but for $35 more, the stainless steel is worth it for the improved shaving experience and premium feel.