DescriptionThis is T screw. T screw, also known as hammer shaped screw, assembly time by profile external directly into the groove, the clockwise rotation of 90 degrees can be automatically locking and positioning, convenient installation, is one of the most commonly used parts of aluminum profile system.Features- Color: Silver. - Material: Carbon steel. - Size: 2.40X1.60X0.70cm/0.94X0.63X0.28 inch. - Made of carbon steel, it has high hardness and good abrasion resistance. - Simple to use and easy to connect between aluminum profiles and other parts. Easy to install. - Able to withstand strong torque with heavy usage, and wont easily strip, nor over-tighten.- Essential jig and fixture hardwares designed with precision machined t-heads that fit inside routed grooves and t-slots,allowing the tightening and customization of your own jigs an easy task. - The excellent workmanship of our product will bring you a good using experience.