A very clean investment cast side plate complete with bevels, countersinks and screw holes that accept up to 10-32 bolts with 3/8" heads. Drafted for ease of inletting and specifically scaled to complement the corresponding lock model. To fit appropriately, the upper lock bolt must be located in the lower, rear most portion of the lock's bolster area. 2-5/8" between lock bolts. Left hand. Available in brass No. 4911501 or steel No. 4911503.