Strength and precision . Designed to punch starter holes for drilling, marking, scribing and starting screw holes. Packaged in a pouch. Made in the U.S.A.. Lifetime warranty5 piece center punch set is made in the U.S.A. and hot forged from alloy steel for maximum strength. Each punch is hardened and tempered for maximum durability, and each is individually black oxided, ground and polished to a smooth metallic shine and corrosion resistance. Designed to punch starter holes for drilling, marking, scribing and starting screw holes. Center punches - 1/4", 3/16", 3/8", 1/2" and 5/8".