Mantis Caliper Folding Keychain Knife (1" Black) B-6

The B-6 Caliper knife from Mantis is a low-bulk, high-utility knife. One side houses a small, folding “break” style blade. The other side has a very innovative “caliper” style clip for use on a belt loop, purse strap, or key chain. The frame locks the blade into place, and the length of the whole package is 4.4” when opened. You blade length is just over 1”. The blade is constructed of a High Carbon 420 series stainless steel.

Information from Mantis Knives

Item #BHQ-12831
MSRP: $26.95
Our Price: $19.99
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  • Overall Length: 4.375"
  • Blade Length: 1.00"
  • Blade Thickness: 0.11"
  • Blade Material: 420
  • Blade Grind: Chisel
  • Finish: Black
  • Edge Type: Plain
  • Handle Length: 3.375"
  • Handle Thickness: 0.29"
  • Handle Material: Stainless Steel
  • Color: Black
  • Weight: 1.58 oz.
  • Knife Type: Manual
  • Opener: Thumb Stud
  • Lock Type: Frame Lock
  • Brand: Mantis
  • Model: Caliper
  • Model Number: B-6
  • Best Use: Everyday Carry
  • Blade Style: Sheepsfoot
  • Country of Origin: Taiwan
  • Product Type: Knife

Customer Reviews

Box Cutter Replacement
Kyle M. on Mar 8, 2020

Need to carry a box knife 24/7? Yes, the caliper has little clearance. Definitely for a keyring only but at least that tightness means it won't fall off. Yes, the blade flick is tight, but I don't need to impress anyone by flicking it out. The box doesn't care. The liner lock has a pressure-retaining bead so the lockout & closure both have positive clicks so you know it won't jimmy open in your pocket. Works for me.

Look for another key chain knife
Wendell H. on Jan 6, 2018

I like the silhouette and concept. But the knife is stiff. The calipers (red clip) is difficult to open and has very small clearance. It is difficult to clip on a key ring, belt loop, etc.

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