Cressi Borg Scuba Diving Knife
http://www.watersportswarehouse.co.uk/shop/scuba-diving-equipment/dive-knives.html
Borg is a modern, large knife with a futuristic design and a strong, tempered blade.
One side of the stainless steel blade is straight-edged, the other one is serrated right along the blade; they are both very sharp and effective for line cutting.
•It is separated from the blade by a small technopolymer thumb tab.
•Sheath with locking mechanism to allow one-hand release.
•The knife comes with two, standard issue straps to attach it to your leg.
•Total length: 10.43" (265 mm)
•Blade length: 5,51" (140 mm)