This Gunsmith AR-15 roll pin starter punch set is made from CNC machined heat treated steel, each punch has a small center stud to go in the roll pin and prevent damage. The AR-15 armorers starter punches come in 4 sizes and make for easy alignment of roll pins. Sizes are 1/8", 3/32", 1/16", 5/64" perfect set for your next AR-15 build. The short shaft starter punch gives you more control putting your hand closer to the pin and keeps you from bending longer finishing roll pin punches. This set is great for installing or removing hollow pins or split roll pins quickly and safely. Made in USA.