New Klein Tools 3255 Bull Pin, Made in USA, Broad Head Bull Pin Resists Corrosion and Mushrooming, Heat Treated Steel with Black Finish, 1-1/4-Inch Drop-forged, heat treated bull pin which increases efficiency by producing a larger striking surface. Design of the head also reduces chance of pin slipping from the hand when aligning holes. Angled head and smooth blending of radii increase strength and reduce the chance of chipping. Below the head, squared-off shoulders have been forged to provide a surface for applying a wrench to loosen wedged bull pins. Long, even taper reduces binding and hang-up. Klein broad-head pins offer added resistance to "mushrooming", permitting much longer use than is possible with conventional designs. Top diameter 1-1/4in. Point diameter 5/16in. Length 13in. Features details Forged, heat-treated bull pin increases efficiency by providing a larger striking surface Head design also reduces chance of pin slipping from the hand when aligning holes Angled head and smooth blending of radii increase strength and reduce the danger of chipping Below the head, squared-off shoulders have been forged to provide a surface for applying wrench to loosen wedged bull pins Made in USA