These foot peg adapters are a 2-part system for convenience and easy installation. Simply select the footpegs you desire & the appropriate motorcycle specific adapter for your bike. The new serrated adapters bite right into your footpegs for a secure attachment, so make sure they are at the desired angle before tighten them down. This convenient 2-part system also allows you to change your pegs without purchasing new adapters. Stock adapters only work with stock foot pegs. Foot peg adapters are required for all Kuryakyn Foot pegs! Adapters are needed to mount aftermarket foot pegs.