These MOUNTAIN TACTICAL Bolt Handles are designed to give you more control over your rifle. The longer handle makes cycling the bolt easier allowing you to eject and chamber a round without taking your sights off your target. A larger diameter bolt knob increases tactility making positive bolt manipulation while wearing gloves a more confident and safe action. Of course, at the end of the day, they just look awesome! Not sure which handle you want to choose? No problem! The austenitic stainless steel handle stem is thread with an industry standard 5/16-24 thread to accept other MOUNTAIN TACTICAL Bolt Knobs or other knobs from manufacturers such as Badger Ordnance, etc. You can switch out knobs with ease.