The neck strap screw holder is made of high quality stainless steel, which is sturdy and durable, and easy to use. The screw is equipped with a high wear-resistant rubber cushion to prevent scratching and keep it firm.The thread is 3/16 of an inch long. There is an elastomer washer glued to the shoulder that is 1/8 of an inch thick. If you remove the washer, you can gain another 1/8 of an inch of threaded stud | 1/4 inch thread diameter, 0.5 inch total shaft length, 0.3 inch thread length, 0.5 inch diameter head, and 0.12 inch rubber gasket thickness. This is not a belt. These are metal 2-D screws that are fixed to the bottom of yout camara (the location for mounting the tripod). You can only use one, the second is a spare. Use it to replace the accessories included with the separately purchased belt | RUGGED CONNECTION POINT; completes quick and easy connection and release system. A secure connection between the enhanced locking camera and the quick-release neckband | EXTENSIVE: suitable for cameras, telescopes, ball heads, mirror plates, quick release plates and other DIY. Fits all types of quick release neck straps and connects to connectors | QULITY ASSURANCE: High quality is our only conviction. If you have any question about the product, please contact us and we will assist you promptly