Wise 8WP95 Cast Seat Mount Spider, Fits 2 3/8" Pedestal Fits 2-3/8" OD Pedestals, 5.25" 4 Bolt Hole Pattern Stainless steel handle to lock seat mount in place on locking and non-locking pedestals Stainless steel handle to tighten or release seat mount or to enable swivel action 3 Year Warranty