Unique coupling system between the plates allows you to make adjustments without removing the recoil pad from the adjuster and provides more precise horizontal, vertical, and diagonal adjustability than the standard model. Simply drill two small 5/16' to 3/8' diameter holes in the pad, so you can insert the included Allen wrench to loosen the two hex-head screws and reposition the adjuster. Allows 1-7/16' vertical adjustment, 5/16' horizontal offset, and up to 40º left or right tilt. SPECS: Machined 6061 aluminum, black, anodized finish. 5-11?16' (14.5cm) long, 2” (5cm) wide, 13?32' (10mm) thick. Fits recoil pads with 3-1?8' c-to-c hole spacing. Includes mounting hardware and Allen wrench.