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