Klein Tools Broad-Head Bull Pin, 1-1/4-Inch

Same pin, one detail apart: the 3255TT has a tether hole so you can lanyard the tool when working at height, and the 3255 does not. The tether itself is not included with either. If your site requires tie-off of hand tools on steel or elevated work, order the 3255TT.

The pin tapers from a 1-1/4 inch body down to a 0.313 inch (7.95 mm) point, so it starts in almost any bolt hole up to about 1-1/4 inch and draws the work into line as you drive it. Overall length is 13.75 inches (34.9 cm), which gives you reach through doubled-up steel or flange stacks.

Yes. The bull pin is forged and heat treated to give a larger striking surface, and the angled head with blended radii is there to resist chipping. Watch the head over its life though: OSHA 1926.301(c) requires impact tools such as drift pins and wedges be kept free of mushroomed heads, so dress or retire a pin that starts to spread. Always wear approved eye protection when striking.

Put a wrench on the shoulders. The squared-off shoulders below the head are forged specifically so you can grip them with a wrench and back a wedged pin out. The long, even taper also reduces binding in the first place.

No. The 3255TT has the tether hole drilled in it, but the tether or lanyard is a separate purchase. Pick a lanyard rated for the tool weight and your work-at-height policy.

The broad head does two things a plain drift pin doesn't: it gives a bigger, angled striking face that stands up to repeated hammer blows, and it keeps the pin from slipping out of your hand while you're lining up holes overhead. If you're only nudging light material into place a slimmer drift pin is easier to handle, but for structural steel and heavy connections the broad head is the one ironworkers and electricians reach for.

It's heat-treated alloy steel with a black oxide finish for rust resistance. Black oxide is a thin conversion coating, not a barrier plating, so on outdoor or wet jobs keep a light film of oil on it between uses.