The PRP allows for adjustment based on shooter preference. From the ability to transition from target to target easily to full lock down for maximum stability and hold on target capability. The PRP can be preset to the exact tension required and then used time after time without having to make any adjustments. With the Picatinny / 1913 compatible Quick lock Cam mount, a weapon can be attached or detached in seconds. No compromise in quality of workmanship and materials. All components are 100% USA made. Features: Load capacity 100 lbs+ Withstands the recoil of a 50 BMG Compact: 5.5" High / 2.25" Diameter Lightweight: Under 2 lbs Spring loaded, Quick On / Off locking 1913 mount Mounts to any 3/8 x 16 base. Ribbed body for no slip grip Quick tension adjust or lock-down Set screws to fix ball-stem to a desired tension. 360 rotation / 30 degree tilt 100% MADE IN USA