The B2 LR II has dual mounts: center socket is countersunk on top but also threaded 3/8"-16. Mount by spinning onto an exposed threaded 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 socket - purchase our stainless steel 3/8"-16 stud
B2 LR II fits Foba Mini SuperBall
B2 LLR II fits Foba SuperBall (uses two M5 flat head screws)
B2 LR II fits some Manfrotto heads
NOTE: Starting in 2012, the Really Right Stuff B2 LR II clamp automatically adjusts to accept all Arca-Swiss style plates except Arca-Swiss P0 Slidefix plates and plates made by Novoflex. Choose a screw-knob clamp if you have Novoflex plates.
B2 LR II is 60mm (2.36") long (lever adds add'l 5/8"), one central countersunk 3/8"-16 socket, two 1/4"-20 countersunk sockets 1.2" center-to-center, spirit level, safety stop relief grooves, and centering index marks, 4.9oz/138g
Easy Top-Loading: In one quick action, the clamp can go from fully closed to fully open. No more lost shots while fumbling to feed the plates into the end of the clamp. The lever can be stopped in 3 positions: 1) fully closed; 2) half open; and, 3) fully open. The half-open position allows the camera/lens plate to slide within the clamp for minor positioning adjustment. Low Profile: Lever does not protrude above or below the profile of the clamp; perfect for low-clearance applications. Close-Fitting Shape: 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 fall. Super-Tough: The Stainless Steel lever delivers a lifetime of wear.
Lever Release Clamp User Manual
This item includes clamp only; mounting hardware or tools not included.