Ontario Knife Strap Cutter OK. This knife by Ontario Knife has an overall length of 6.5 inches make it the perfect size to get what you need done done fast without being obtrusive. The Ontario Knives Econo Seatbelt Cutter comes complete with a MOLLE compatible nylon sheath and is made in specialized factories. Specifications for Ontario Knife Econo Model Strap Cutter w/ Sheath: Blade Length: .4in (1cm) Blade Thickness: .025in (.064cm) Hardness: 55 HRC Features of Ontario Knife Econo Seatbelt Cutter w/ Sheath: Bi-Metal Stainless Blade Material Mirror Blade Finish Flat Blade Grind Plain Edge Fixed Blade Package Contents: Ontario Knife Strap Cutter Ontario Knife OK1420: Strap Cutter