Our new HIT-66-283 template is designed to quickly and accurately install or retrofit the Schlage LE series mortise locks. All required holes are lined with hardened drill bushings, the larger holes for the mortise cylinder and lever spindle will also accept hole saws. Also included in the template set is the drill guide for the angled door position switch. Plates are machined from aluminum and anodized. This template requires the HIT-66 clamp system that includes the HIT-4509 mortise alignment plate (clamp system sold separately). The template set includes both inside and outside template guides. All drill guide holes are identified for trouble free drilling. Door range for the HIT-66 clamp system is 1-1/4” to 2-7/8”.