ARC-LR is a new RRS lever-release clamp for photographers that features R-LOCK, a new feature designed to improve ease of use, expediate deployment of equipment, and provide an additional measure of securing one's kit.

The ARC-LR provides the certainty of auto-centering with both auditory and tactile feedback when your camera/lens plate is centered and locked within the clamp.
R-Lock uses a 5mm steel pin to engage the R-Lock mounting divots (holes) when you load your R-lock equipped rail/plate into the clamp and slide it into position.

An ambidextrous butterfly-latch and lever allows the user to arrange the clamp to be operated according to the user's preference.

For the first time, ARC-LR represents a RRS lever-release clamp option with adjustable tension, providing compatibility with most 3rd-party plates and rails.

• R-Lock R-LOCK (short for Rapid-Lock) System adds unique safety-stop features which are built in to both a mounting rail and quick-release clamp that adhere to the RRS 1.5” Standard. The ”hard-stop” feature is comprised of a 5mm diameter steel pin that engages 5.5mm diameter holes in the rail. In addition to supplementing the traditional friction-based clamping mechanism, the interface prevents unintentional repositioning of the rail within the clamp when the R-LOCK is engaged.
• R-Mount Interface: R-Mount’s rosette will prevent twisting at the coupling point between the ARC-LR and RRS head over time, and will assist in eliminating “play” that results from regular use on our earlier tongue-and-groove designs.
• Easy Top-Loading: In one quick action, the clamp can go from closed to fully open, allowing easy top-loading of RRS Dovetail and arca-swiss compatible quick-release plates
• Visual Confirmation of Lock Position: You can readily observe if the lever is locked, half-open or fully open
• Adjustable Clamp Tolerance: For the first time, the ARC-LR allows users to adjust a RRS clamp's jaw tolerance to conform to some 3rd party Arca-style plates or rails.
   

• Jaw Length: 1.57"/ 40mm
• Width: 2.55"/ 65mm
• Height: 0.69"/ 18mm
• Weight: 4oz/ 114g
• Center hole 3/8"-16
• Outer holes 1/4"-20 spaced 30mm apart on center

• Qty.1 ARC-LR clamp 
  
• Qty.1 Flat Head Screw, 1/4"-20 x 1.25" Long
• Qty.1 Flat Head Screw, M6-1.0 x 25mm
• 5/32" Hex Key
• QR Manual Card
• ARC-LR Manual