Heat-treated, drop-forged bull pin provides impeccable reliability. Large, flat striking surface helps reduce the risk of mistaps and slippage. Mushroom-resistant design delivers greater durability. Squared-off shoulder allows you to get more leverage when loosening tightly wedged pins with pliers or a wrench. Smooth, tapered shift minimizes the potential for binding. Tool Type: Bull Pin; Applicable Material: Metal; Application: Ironworking; Metalworking; Diameter: 5/16"; 1 1/4".