Really Right Stuff B2-LR II 60mm Dual Mount Lever-Release QR Clamp B2-LR-II

The B2-LR-II by Really Right Stuff was designed to provide a sturdy interface between your camera/lens and tripod. Attaching your camera/lens to a typical 1/4"-20 screw is not only tedious and insecure, but also allows the camera/lens to freely rotate with nothing preventing it from coming loose. The B2-LR-IIsolves this problem with a 2-part system: a quick release clamp and a quick release plate. The clamp jaws open and close in one of two ways: by rotating a knurled knob on the screw-knob clamps, or by flipping a single level on the level release clamps. In addition, the B2-LR-II features dual mounts: a center socket is countersunk on top but also threaded 3/8"-16. Mount by spinning onto an exposed threaded 3/8" post or with flat head screw from above (accept M6 or 1/4"-20, not 3/8"). These clamps are appropriate for mounting on: any head or platform with exposed 3/8"-16 threaded post can drop onto a female socket tapped 1/4"-20 (for any RRS head) or metric 6 (for all others; all screws sold separately), any head or platform with exposed 1/4"-20 threaded post - install a reducer bushing into the socket hole of the clamp, any head or platform with 3/8"-16 female socketFeatures:Easy Top-Loading: In one quick action, the clamp can go from closed to fully open, allowing easy top-loading of Arca-Swiss-compatible quick-release camera and lens plates; no more lost shots while fumbling to feed the plates into the end of the clampVisual Confirmation of Lock Position: You can readily observe if the lever is locked, half-open or fully openLow Profile: The lever does not protrude above or below the top or bottom of the clamp, and, in the closed position, the lever closely hugs the contours of the clamp; this makes it less of a "weed catcher" in the field and reduces the chance of being damaged in a fallLess Abrasive, No Twisting: The smooth contours of the lever are less abrasive than standard knurled knobs, and for those with arthritic hands, the graceful lever cams open and closed with just finger forceSuper Tough, Reliable: The Stainless Steel lever delivers a lifetime of wear and rides on a self-lubricating, wear-resistant bronze bearing surface. Delivers 50lbs of holding power under full compression (the fully closed position) with our plates; this is more than sufficient for any practical photographic applicationLaser Engraved for precise and repeatable positioningSpecifications:Jaw Length: 2.4"/ 60mmWidth: 3.4"/ 86mmHeight: 0.6"/ 15mmWeight: 5.3oz/ 150gCenter hole threaded 3/8"-16Outer holes threaded 1/4"-20 spaced 30mm apart on center Really Right Stuff B2-LR II 60mm Dual Mount Lever-Release QR Clamp B2-LR-II