Escape Climbing 25 Pack of 2&rdquo; Alloy Steel Bolts | Durable Hardware for Rock Climbing Holds | 3/8-16 Socket Head Cap Screw | Designed for Indoor Use HIGH QUALITY | Industrial grade steel bolts reduce corrosion and increase thread strength DURABLE | Manufactured with Cold-Forging techniques which result in higher fatigue resistance CONVENIENT | Bolts are designed for simple and easy installation for rock climbing walls ADAPTABLE | Hardware designed and produced for indoor gyms and indoor home climbing walls DIMENSIONS | 2 steel bolts with 3/8-16 socket cap screw