Klein Tools 3255TT Broad Head Bull Pin with Tether Hole, 1-1/4-Inch Forged, heat-treated bull pin increases efficiency by providing a larger striking surface Tether hole allows you to tether tool while working at height Angled head and smooth blending of radii increase strength and reduce the danger of chipping Head design also reduces chance of pin slipping from the hand when aligning holes Squared-off shoulders, below the head, have been forged to provide a surface for applying wrench to loosen wedged bull pins