Lyman Improved Lube and Sizing Dies now have 90 degree hole spacing. It is now easy to lubricate bullets even with today's hard lubricants. Lyman sizing dies also feature a tapered mouth and hardened interior insuring alignment for perfect cylindrical shape. Interior dimensions correspond to suggested diameters for all popular rifle and handgun calibers. Fits Lyman 450/4500 Lube Sizer and RCBS Lube-A-Matic-2 Bullet Sizer/Lubricator. Sizer dies also help to crimp the gas check on the base of gas check style bullets. Features: - Works for the 22 Jet, 221 Fireball, 22 Cal (except 22 High-Power). - Sizes and Lubes Cast Bullets - For Use with RCBS or Lyman Bullet Sizer/Lubricators - Also Helps to Crimp the Gas Check on the Base of Gas Check Style Bullets Specifications: - Material: Steel - Diameter: 0. 308 - Quantity: 1