What is the most useful hobby knife blade?

The No.11 fine point blade is the most versatile — it handles cutting, trimming, and light scribing. Keep a stock of them and change frequently. A sharp blade is safer than a dull one because you need less pressure.

How often should I change my blade?

Change the blade as soon as it stops cutting cleanly — typically every 30-60 minutes of active cutting. Dull blades require more pressure, leading to slipped cuts and injuries. Buy blades in bulk (packs of 100) for economy.

What handle should I use?

The Swann-Morton No.3 handle is the UK standard for fine work. X-Acto No.1 (American) is similar. For heavier work, use a No.4 handle with larger blades. Rubber-grip handles reduce fatigue during long sessions.

Is a scalpel better than a craft knife?

Surgical scalpel blades (Swann-Morton 10A, 15) are incredibly sharp and excellent for fine work. They are thinner than craft knife blades, so they cut finer lines. However, they are less robust and not suitable for heavy cutting or prying.

ModelCalcs

Blade Selection Calculator — Right Tool for the Job

Choose the right hobby knife blade for cutting, scribing and trimming tasks.

Task

Material

Thickness

How We Calculate This

Recommends the optimal blade type based on your task, material and material thickness.

Blade Types

No.11 Fine Point — General purpose, fine cutting and trimming
No.10 Curved — Scraping mould lines, curved trimming
No.17 Chisel — Paring resin, heavy trimming
No.24 Heavy Duty — Thick materials, heavy cutting

Frequently Asked Questions

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Last updated: February 2026

All calculations are estimates. Always verify quantities before purchasing materials.