Our two screw heads have the same size, with only a difference in the length of the screw 20Pcs T Slot L-Shape Interior Inside Corner Connec... – Grandado T-shaped head design, which can better fit the track and be more flexible, can withstand greater torque, and is not easy to fall off. Accessories Sourcing Map 6Set Bolts Knob Kit 1/4-20 X 3 Threaded Bolts 1.26 Dia 1/4 Hex Hand Nut Clamping Knob With Washer For Woodworking Jigs And Fixtures, Black Silver T Track 5/16-20 T Bolts DCT Tee Bolt Set - 20 Pack 2-1/4in T Bolts For Woodworking, T Track Galvanized T Bolts Please pay attention to whether the size and track you want to purchase are suitable when making a purchase. Choose from our selection of T-track bolts, including structural framing, clamping and workholding, and more. Same and Next Day Delivery Easy to use, install the track screw head into the appropriate track, slide it to the appropriate position, and then tighten it with a nut to complete the installation Easy to use, install the track screw head into the appropriate track, slide it to the appropriate position, and then tighten it with a nut to complete the installation.