ANARCHY OUTDOORS LITTLE BERTHA SHORT LENGTH BOLT KNOBS The Little Bertha Bolt Knob, similar to the Big Bertha bolt knob, has an hourglass shape. The design of this bolt knob makes it more comfortable for individuals with regular or small hands. The diamond-shaped rivets enhanced the grip. It comes in a matte black, red, or polished titanium. Each option provides a sleek look, making it an excellent addition to your gun. This smaller knob has two thread sizes; the standard 5/16x24 and the M6x1. The 5/16x24 works with all custom-made Anarchy handles. The M6x1 fits the CZ 457 and other similar model handles. SPECS 5/16 x 24 Mfg: Anarchy Outdoors