Quick realease. Steel bolt with alloy lever.
Quick Release bike cycle Bicycle QR Seat Post Clamp Skewer X 2
Steel QR Quick Release Skewer Cycle Axle Hub Lever for Bike Wheel Front or Rear
HOgardenME Bike Seat Clamp, 38mm Quick Release Bike Seat Clamp Bike Frame Seat Clamps with Quick Lever Anti Slip Hollow Frame Seat Tube
Bicycle Seat Post Clamp Skewer Aluminium Alloy Quick Release Bike Seatpost Clamp for Mountain Bike Road Bike
1pair Quick Release Bike Repair Stand Bike Handlebar Supports Bike Accessories
Merzio 2 PCS Bike Seat Post Clamps, Sturdy and Durable Quick Release Bike Clamps, Aluminium Alloy Bike Seatpost Clamps for Mountain Road and Folding Bikes, Black (34.9mm)
