The Hope Seat Clamp Quick Release will give you years of trouble free use. It's machined from sturdy billet aluminum and the QR lever pivots on a brass seat. The collar on the seat clamp is a universal style - meaning either bolted or QR can be achieved on the same collar (the QR does not come with a bolt, and vice versa).
Quick-lift quick-release lever
Special smooth design to avoid any lef interaction
6061 T6 aluminium
For aluminium seatposts
Diameters: 28.6, 31.8 and 34.9mm