Remove loose pins from assemblies, after initial loosening with a starter punch. Hardened and tempered for maximum strength and durability. Smooth finish and corrosion resistance. Made in the U.S.A.. Lifetime warranty Like all SK punches our pin punches are hot forged in America from premium alloy steel. SK punches are hardened and tempered for maximum strength and durability, plus individually ground, polished and coated for a smooth finish and corrosion resistance