Designed for use with the RCBS Lube-A-Matic Bullet Sizer/Lubricator, the Top Punch is machined to fit specific cast bullet nose designs. It properly aligns bullet to be sized in the Lube-A-Matic Sizer without damaging the bullet nose. Use with the RCBS Lube-A-Matic Bullet Sizer/Lubricator Machined to fit specific cast bullet nose designs Aligns bullet to be sized without damaging the bullet nose