Description: Triangle Hand Knobs are made of plastic with non-flaking brass inserts for a smooth finish; T-bolts and flat washers are made of stainless steel for durability. The ergonomic design of this six-pointed star perforated knob allows for easy adjustment and twisting by simply inserting the head of the T-bolt into the track using a washer and aligning it with the threaded knob. The T-Track Knob Kit is suitable for universal track, T-Tracks and double cutouts, use it to help you customize a variety of woodworking jigs and fixtures to optimize your T-Track system. These woodworking clamp knobs include T-bolts, knobs, and washers that can be easily used to enhance a variety of applications, including miter gauges or T-track fences, blocks, feather boards, hold-down clamps, and more