USED Anarchy Outdoors Little Bertha Standard Thread Black. The design of this bolt knob makes it more comfortable for individuals with regular or small hands. The diamond-shaped rivets enhanced the bolt knob's grip. 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. All of our standard thread knobs will fit on the Christensen Arms Standard Rifles Specifications for Anarchy Outdoors Little Bertha Bolt Knobs: Manufacturer: Anarchy Outdoors Diameter: 0.803 in Length: 1.495 in Country of Origin: USA Threads per Inch: 5/16x24 Weight: 0.8 oz Features of Anarchy Outdoors Little Bertha Bolt Knobs The design allows for easy handling; Included Rivets allow for better grip; Two thread sizes allow for an increased range of bolt handle sizes Package Contents: Anarchy Outdoors Little Bertha Bolt Knobs Anarchy Outdoors 791617485709: Little Bertha Standard Thread Black