Prostart Cradle Support identical to the part delivered with the Pro Start. You only need a second support, if you want to equip another boat or provide two different locations on a boat. Compaitable with the Velocitek and Tacktick Micro Compass mast support. This cradle is identical to the mounting cradle that is included in the box with the prostart. Order this part separately if you are planning to bolt cradles onto more than one boat. The Hole Locations are compatible with the Velocitek Mast Mounting Bracket or Any Tacktick Micro Compass Bracket. Fits Prostart and Prostart Classic.