Kayaker Compass. Kayaker Bulkhead Mount features: , 2-3/4″ Easy to Read Dial, Adjustable up to 45 degrees, Easily Installed, Fits 2.94″ (7.46 cm) Mounting Hole, Built-in Compensators to Easily Adjust for Deviation, Scientifically Matched Sapphire Jewel & Hardened Steel Pivot Dial Movement, Powerful DirectiveForce Magnets for Fast Heading Lock-on, High Temperature Composite Construction for Extended Operating Range, 100% Repairable, Exclusive 5-Year Ritchie