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Add some style and enhanced ergonomics with a MDT Bolt Knob. Designed to give you better control over your existing bolt, the textured soft polymer sleeve and subtle hourglass shape cradles your finger so it can be easily maneuvered without slipping. This clamp-on version can be easily installed over your existing bolt knob, so there's no need for gunsmithing or modification. Specifically designed clamshells are made for each of our supported inlets and uses friction pads and 3 screws to keep the bolt knob tight and secure.