Zero Tolerance Knives 0550 Hinderer Framelock Knife 4-1/2" closed. 3-1/2" Crucible S35VN stainless blade with dual thumb studs and stonewash finish. This high performance steel offers high wear resistance, increased toughness, and resists edge chipping. 6AL4V titanium frame with textured black G-10 front scale. Four way reversible stainless pocket clip. Designed by Rick Hinderer.