KNUCKLEDUSTER
One Piece Bottle Opener Tool
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Cut from a single piece of 304 stainless, the One Piece Self Defense Bottle Opener is a 148mm tool with a protruding front end, a finger hole and an integrated bottle opener. At about 231g it is a solid, no-nonsense item for both opening and defence.
One Piece, No Weak Points
Being made from one piece of 304 stainless means there is nothing to loosen or rattle; the tool is as strong as the steel it is cut from, and the grade shrugs off rust. The finger hole lets you wear it or grip it like a knuckle, while the protruding end gives the frame its bite.
Open Bottles, Break Windows
The integrated opener earns its keep daily, and the hardened tip is sized to take a window in an emergency. At 231g the tool has real weight behind it, yet the 148mm length keeps it packable in a bag or a glovebox.
Key Features & Specifications
- Material: 304 stainless steel, one piece
- Size: 148 x 32 x 89 x 9mm
- Weight: approx. 231g
- Function: self defence, bottle opener, finger hole
Browse our outdoor tools or the full self defense collection.
Shipped worldwide in plain, discreet packaging.
- We Ship Fast! Most orders ship within 48 Hours (excluding weekends & holidays)
- Free Standard Shipping on Orders Over £39
- £6 Flat-Rate Shipping on Orders Under £39
- Questions? Email support@knuckleduster.co.uk

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