ProTouch™ Screw Snap-Off Knife 25mm - IRWIN 10507106, The IRWIN ProTouch™ Screw Snap-Off Knife has a manual nose screw for increased blade security. Solid cast aluminium body and steel blade guide. The self-locking blade slider ensures fast blade adjustments. It also features blade storage, hinged end-cap and ProTouch™ grip for excellent control.1 x IRWIN ProTouch™ Screw Snap-Off Knife 18mm IRWIN® 10507106 ProTouch™ Screw Snap-Off Knife 18mm