Hammers One Piece Offset 30mm Scope Mount w/ 1inch inserts Picatinny QD Cam Lock A solid and heavy-duty offset ring mount to install a magnified optics scope for easier eye relief setup. It offers an offset length of 2 1/4inch from its bottom clamp. Very helpful when mounting a scope with a longer eyepiece tube, especially ones with illuminated reticles. The strong and sturdy cam levers are made of steel and can be trusted for many years of reliable service. The QD cam locks can be finger-adjusted when needed. With the cam lever at the unlock position, pull up and rotate the star wheel on the opposite end of the clamping bolt to adjust the locking width. Features: Ring Size: 30mm (1inch metal size inserts included) Centerline Height - 40mm Machined from extruded aluminum alloy 6061 Anodized black matte finish Clamp attachment - two-finger adjustable, quick-release cam locks Height from top of rail to bottom of cradle: 1 Overall height: 2.50 Overall length: 5.30 Offset length: 2.25 Inner space between the rings 64mm (2.52 inches) Ring width: 16mm(0.63inch) Recoil lug: 2 cross-slot square bolt shafts Mount weight: 8oz. Package contents: 1x Offset 30mm Scope Mount 1x Picatinny ring top (1 length)