This mast bracket is compatible with almost all teardrop and round cross-sectioned masts. The bracket comes packaged with a hex key, a stainless steel slug and all the screws, fasteners required to attach a cradle to the bracket and the bracket to your mast. The design of the bracket provides space for lines to pass between the device and mast. The W Bracket also comes with Dyneema line so you can lash your bracket to the mast. The W Bracket is compatible with the following Velocitek products: Prism ProStart SpeedPuck