Star Mount Adapter Take advantage of the new 4-star accessory mount system with your "old-style" MultiMaster MSX. "New-style" MultiMaster accessories will fit your MultiMaster MSX but add a star mount adapter to your MSX for additional torque or to prevent slippage by up to 40%. The bottom side has 4-star male mount that fits securely into the "new-style" accessories, the top side is carbide coated to prevent slipping in the "old-style" MultiMaster MSX mount. Screw Set The replacement screw set includes two screws and two washers for sanding pads and blade attachments. (See picture under the addiitional images tab.) Screw set is optional but suggested by Fein.