Scotty 1050 Depthmaster Masterpack w/1021 Clamp MountMeet the Scotty 1050 Depthmaster Masterpack with 1021 Clamp Mountthe portable downrigger that delivers dependable depth control without permanent mounting. This 23" Depthmaster Masterpack combines Scottys trusted performance with a clamp on bracket for a compact, non permanent rig you can take on any boat. Portable Clamp on Bracket: Quick, non permanent mounting anywhere on your boat with the included 1021 clamp on bracket. Downrigger Boom: 23"