Swivl - Eze Snap - Lock 1.77" Seat Base Plates. A great combination of value and performance! All components snap and hold securely together. Posts are sturdy bright anodized aluminum to resist corrosion. Also, seat mounts are E-coated for superior resistance to corrosion. Buy with confidence... I personally guarantee the quality of your purchase 100%! Check these features: Type A / Operator Pedestals have an ergonomic swivel-locking handle with stainless steel components; Seat mounts have been designed to permanently lock into the post in any swiveling position Meets ABYC H31.6.1 standards; All posts include a larger locking clip with a metal insert that allows the posts to lock into bases for added safety; Just press the button to release; Both the snap-lock and locking clip are engineered to prevent unintentional detachment; Note: not recommended to interchange with other manufacturers" products. Order yours today! AVAILABLE SEPARATELY: 7"x7" Stainless Steel or 7"x7" Offset Hole - word search in our Store for "Swivl-Eze". Swivl-Eze Snap-Lock 1.77" Base Plate, 9" Aluminum