Zero Tolerance Hinderer 0566 Assisted Opening Knife Elmax Satin-StoneWash ZT features the patented SpeedSafe® assisted opening system. Deploy the blade quickly and easily, even in gloves, using the ambidextrous flipper. Zero Tolerance 0566 is a Hinderer designed assisted opening folder. This knife is more compact than the larger 560/561. The blade is satin/stonewash finished Elmax steel. The front scale is G-10. The back is stainless steel with a frame lock and a lockbar stabilizer. Quad-mounting system with deep carry pocket clip.