Forster Products' Universal Bullet Puller fits not only Forster's Co-Ax Press for which it was originally designed, but it will fit virtually any standard reloading press with a 7/8-inch by 14-inch thread. It makes pulling bullets much easier, quicker and safer than using a hammer style puller. To ensure true universal function, the Universal Bullet Puller uses diameter-specific Bullet Puller Collets to hold the bullet, which are available in twenty-one (21) different sizes from .17 to .458. So, almost any caliber of bullet can be held securely by simply tightening the collet screw with a 9/16-inch wrench. Changing calibers is as simple as changing collets.