Provides sturdy mount for seat (sold separately) and rotates full 360 degrees Rotation is regulated by dual locking devices: Lift positive lock lever to rotate, lower lever to lock seat in place Smooth inner base for sure mounting to pedestal (sold separately) Silver powder coat finish Meets ABYC-H31, Type A, and Garelick performance standards Low profile design allows 360° of rotation Heavy duty anodized aluminum slide plate has standard 5"x12" hole pattern to accommodate standard seat mounting holes 360° rotation is regulated by dual locking devices - lift the positive lock lever to rotate. Drop the lever to lock in place in 10° increments. Secondary twist control offers variable drag adjustment and can be tightened down to lock in place. Internal Delrin Bearing Cup provides smooth, gaul-free operation Powder coated finish