This clamping kit includes 12 pieces and is made out of steel. In addition, it features fast set-up action. This clamping kit is designed for use with CNC machining centres, CNC machining centres. It includes 2 hex keys, 4 mitee-bite t-nuts, 6 mitee-bite fixture clamps. Plus, it has a 5/16"-18 tip, and a 1 7/64 inch length.