Swivl-Eze 2064 Lock'N-Pin Posts - Fixed Hgt. 6'', 1.50'' Dia., Bulk Pack ,Non-Threaded. Redesigned in accordance with ABYC H31.6.1. Locks to prevent unintentional detachment. Fits 3/4'' pin-type bases. Zinc-plated, brushed finish steel pins. Aluminum posts. Depth required below deck surface: non-threaded bases - 2.75'' threaded bases - 4.0''