Replacement clamp bolt kits for TC Bros. Pro Series Truss Risers use the ultimate in premium hardware. These kits include a 4-pack of genuine ARP 12 pointstainless steel bolts. These bolts are made in the USA using a patented cold forging process that produces a corrosion resistant stainless steel that is stronger than Grade 8 steel bolts. Please note that TC Bros. Truss risers with the digital top clamps use a different length bolt that the standard top clamps, so make sure you purchase the correct length if you are doing a clamp conversion.