Large, Straight, and Surgically Sharp
The Swann Morton No.21 is a large straight-edged blade built for bold, precise cuts — a staple in general surgery, dissection, and any application where a long, clean straight incision is required. Paired with the BM reusable No.4 handle, this kit delivers the confidence and control that professionals and serious hobbyists demand.
Blade & Handle Specification
Blade: Swann Morton No.21 — large straight-edged blade, non-sterile carbon steel
Handle: BM No.4 reusable stainless steel scalpel handle
Compatibility: BM handle fits all standard No.4-compatible Swann Morton blades
Sterility: Non-sterile blades — for professional use with appropriate infection control protocols
Key Features
- BM precision-machined No.4 handle for superior grip and control
- Swann Morton No.21 — large straight blade for bold, clean incisions
- Reusable BM handle reduces waste and long-term cost
- Compatible with the full range of No.4-fit Swann Morton blades
- Available in 5, 10, 30, 50 and 100 blade packs
Professional & Hobby Applications
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Surgical & Clinical: General surgery, large incisions, and dissection
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Anatomy & Dissection Labs: Educational dissection and biological specimen work
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Model Making: Long straight cuts on foam board, balsa, and plastic sheet
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Leatherwork: Straight cutting and trimming on leather hides and panels
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Paper Crafting: Long straight cuts on card, mount board, and thick paper
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Art & Illustration: Large stencil cutting and straight-line mixed-media work
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Woodwork & Craft: Scoring and trimming on thin wood and composite materials
What’s In Your Order
1 × BM Reusable No.4 Scalpel Handle + your chosen quantity of Swann Morton No.21 Non-Sterile Blades. Blades supplied in standard Swann Morton packaging. BM handle ready for immediate use.
Safe Blade Handling
Always use a blade remover or forceps when fitting and removing blades — never use fingers. Dispose of used blades in an approved sharps container in accordance with local clinical waste regulations.
Frequently Asked Questions
What is the Swann Morton No.21 blade used for?
The No.21 is a large straight-edged blade used in general surgery, dissection, and procedures requiring a long, clean straight incision. It is also widely used in anatomy labs, model making, leatherwork, and any craft application where a large, sharp straight blade is needed for bold, precise cuts.
What is the difference between the No.21 and No.22 blade?
The No.21 has a straight edge, making it ideal for straight incisions and dissection. The No.22 has a curved belly, better suited for sweeping cuts. Both are large blades that fit the BM No.3 handle. Choose the No.21 for straight cuts and the No.22 (or No.23) for curved incisions.
Is the No.21 blade suitable for model making and craft?
Yes — the No.21 is popular with model makers, leatherworkers, and paper crafters who need a large, sharp straight blade for long cuts on foam board, balsa, leather, and thick card. Its straight edge makes it ideal for cutting along rulers and straight edges for clean, accurate results.
Can the BM No.4 handle be sterilised between uses?
Yes — the BM No.4 stainless steel handle is fully compatible with autoclave sterilisation, hospital-grade liquid disinfectants, and UV sterilisation cabinets. Always inspect the handle before each use and replace if the blade-seating groove shows any signs of wear or damage.
Do I need to sterilise the No.21 blades before clinical use?
Yes — these are non-sterile blades and must be sterilised before use in any clinical or surgical setting, in accordance with your local infection control protocols. For non-clinical use such as craft, model making, or dissection labs, standard hygiene practices apply.
