T-bolts made of 304 stainless steel, with dimensions of 20mm x 20mm x 5mm for the base plate, suitable for the T-slot on the roof rack crossbars. Includes T-bolts, lock nuts, and washers (4 washers per bolt) in the roof rack mounting hardware kit, ensuring a satisfying purchasing experience for customers. High fixing strength, durable, easy to install, can be installed on any L-Track rail. Made with stamped slot accessories, more durable than welded parts, rust and corrosion resistant, suitable for harsh environments, perfect T-slot accessories for SUV/RVroof racks Suitable for securing items in trucks, vans, enclosed trailers, beds, pickups, campers, or garages, compatible with all L-Track rails, with locking function to prevent cargo from sliding. Package content: 10 pcs T-bolts.10pcs nuts ,30 pcs washers Description T-bolts made of 304 stainless steel, with dimensions of 20mm x 20mm x 5mm for the base plate, suitable for the T-slot on the roof rack crossbars. Made with stamped slot accessories, more durable than welded parts, rust and corrosion resistant, suitable for harsh environments, perfect T-slot accessories for SUV/RVroof racks. Includes T-bolts, lock nuts, and washers (4 washers per bolt) in the roof rack mounting hardware kit, ensuring a satisfying purchasing experience for customers. High fixing strength, durable, easy to install, can be installed on any L-Track rail. Suitable for securing items in trucks, vans, enclosed trailers, beds, pickups, campers, or garages, compatible with all L-Track rails, with locking function to prevent cargo from sliding.