Quality Materials: These are two sets of clamp brackets, made of alloy steel, hard to scratch or bend, corrosion resistant and durable. Versatility: This clamp provides exceptional clamping forces for your setups and universal T-track system assemblies. It is ideal for holding, positioning and fixing work for woodworking or metalworking. Simple to use: This is for a set of holding clamp for use with the T-shaped track. clamp anywhere along the recessed T-track.Slides into the T-track and quickly attaches by turning the hand knob nut.Wide Application: This woodworking tool is for a set of hold down clamps for use with T-tracks and in many wood and metalworking applications for maintenance, positioning and securing. Complete Accessories: You will receive 2 sets of complete clamps (threaded rod, T-screw, nut, slide block, washer, clamp board), complete accessories to meet your daily needs.