Clinometer with High Resolution for Modern Boats Directly attaches to a bulkhead. The easy-to-read gauge provides rapid heel-angle readings. There is no hardware required. PERFECT TILT READINGA unique damping fluid is used by the brass ball to ensure smooth, precise readings. FAST-READING DISPLAYAn effective, simple-to-read display is created using hand-painted and engraved numbers. DESIGNED TO BE SHATTERPROOFTo ensure maximum longevity, the tube assembly is manufactured from a tough co-polymer "flex tube." MOUNTS WITH 3M VHB TAPE - Includes a piece of 3M VHB (Very-High Bond) tape on the back for easy mounting. Small in size allowing for easy mounting on almost any surface.