Master USA 4.75 Inch Closed Length Spring Assisted Knife. Black Blade. Camo Handle. Includes Pocket Clip Features Spring assisted knife3.75″ 3mm thick, stainless steelBlack blade4.75″ closedCamo coated abs handlIncludes black pocket clip Opening is the same as regular folder, but once the opening process is manually started, then the Internal Spring Kicks in, and helps to fully open it. Making it Quick, Smooth and Easy to open.!