Check the listing for details. Zero Tolerance Anso Double Detent Folder - 0230-ZT. Condition: New. Listed at 204.00 USD. Zero Tolerance Anso Double Detent Folder - Brand New Minimalist design meet maximum performance in the new 0230 from ZT and Danish designer Jens Ans¯. This slip-joint knife features a double detent system: two steel detent balls, one on each side of the blade. The hold the blade safely closed for carrying. Then, for controlled open and close, the 0230 also has a half-open position. Everything combines to make this a simple, yet extraordinary pocketknife. Made in the USA Double detent system: two steel detent balls, one on each side of the blade for safe carrying, controlled open/close Blue anodized aluminum backspacer with integrated lanyard attachment CPM 20CV blade steel offers exceptional hardness, wear resistance, edge retention; stonewashed finish helps hide use scratches Ultralightweight carbon fiber handle Mfg Part #: 0230-ZT