Get the Lock on Quality. The 1.77 group delivers a great combination of value and performance. All Snap-Lock series components snap and hold together Posts are sturdy bright-anodized aluminum Seat Mounts are E-coated for superior construction Available in a wide choice of bases, sizes, and materials The Swivl-Eze Difference Type AOperator models have ergonomic swivel-locking handle with stainless steel components Seat mounts have been designed to permanently lock into the post, in any swiveling