Oversized bolt knob allows fast, easy access to bolt, even with gloved hands. The extra size and length gives unparalleled control of the bolt and provides extra leverage for stuck rounds. 7075 T6 Aluminum alloy to keep the weight down to a mere 3 oz, has 5/16 x 24 threads and a Mil-spec black anodized finish to last a lifetime. Gunsmithing is required.Notes: Fits any bolt that can be turned to .313" diameterBolt handle needs to be turned to .313" diameter and threaded 5/16x24tpiInstructions included for Remington 700