Made from one piece of machined aluminum, the Tight Lite comes equipped with a nylon thumb screw or stainless steel set screw to attach to the bar of most major brands of archery sights. The back of the Tight Lite has pre-machined holes that provide access to the screw holes of most major lights on the market, should you need to replace a battery or a control panel. The lighting device is mounted to the Tight Lite with a piece of very high bond double-sided tape. I can assure you, after all the testing we put the Tight Lite through, the tape is not coming off. Tight Lite fits most dovetail and half-dovetail extension bars, comes in several colors, and is beloved by just about every archer who uses it.