Bolt Lift SV (Small Version) consists of two reinforced polymer knob halves and some supporting parts. Users can choose between a permanent installation using epoxy, a rock solid removable setup, or a quick simple install using the supplied spacers to tailor the fit of the Bolt Lift to the factory bolt handle. A stainless steel screw to clamp the knob halves together and some reinforcing pins round out the package. KRG has selected a very strong , reinforced polymer material and incorporated it into a thick-walled, high strength design to ensure that your Bolt Lift will be the last part on your rifle to fail. As an added benefit, the polymer construction will isolate your hand from environmental effects.