Woodys Signature Series 60 deg. Stainless Steel Carbide Studs - 1.325in. Stud Length - 5/16in. Thread SSP-1325-CS Signature Series is high-corrosion-resistant, allowing for use in rigorous environments 60 deg. carbide point for superb penetration and durability One-piece stud/head is resistant to impact even at extreme variations Packs include studs and steel or aluminum lock nuts 144 pack