The BH1L is designed for serious shooting applications, with the versatility to operate well while glassing. The new Lever Clamp locking mechanism makes clamping in your rifle, spotter, or binoculars swift and foolproof. The clamp features a more visible bubble level and toolless adjustment. The 360Adeg panning base will help you grid those mountainsides without missing an inch. Arca-Swiss Standard Lever Clamp Locking Mechanism 3.3" Height 2.24" Base Diameter 360Adeg Panning Base Travel 44lbs Max Load 1.05 lbs Weight Machined Aluminum Mfg: Revic Optics