Enzo PK70 Folding Knife The simple slip joint mechanism with a distinct half-opend stop coupled with a 70 mm blade is designed for easy opening and safe handling. Rock solid construction built to last, this may be the last knife you'll ever need. The PK70 was specifically designed to comply with the strict rules and regulations, necessary for legal carry, in the UK and other European countries. As always, you can depend on the excellence built into every EnZo product