Including: 5 M8 X 100mm T -rail bolt kit, including T -shaped bolts, knobs and washer. Compatibility: Support the 3/4 X 3/8-inch standard oblique cut slot (19mm), 30mm and 45mm T-Slot Track, use it to help you customize fixtures and fixed devices to optimize the T-track system. Application: This T -bolt knob king can be used to enhance applications of applications, including T track fences, fences, thin tear fixtures, oblique fixtures, oblique , stop blocks, hold , etc. Material: The knob is made of polypropylene plastic, and the brass is inserted with molds, which will not be peeled; T -shaped bolts made of steel; metal washing machines. Workman work: Sophisticated, strong, durable, and the triangle knob is and comfortable. Color: Silver & Black Material: metal+plastic Package Contents: 5 x T -rail bolt Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.