Install Knobs and Handles without the tedious hours of measuring or making jigs - Fast, accurate hardware installation in seconds, every time. Adjust the sliding guides along the laser etched rulers (inch mm) to precisely match your hardware location and measurements. Tighten thumb screws and drill through the hardened bushings, no clamp needed! Reversible design allows you flip tool over to the next door without re-adjusting. Includes additional guide for drawer fronts, and end stop for doors. Install cabinet hardware in minutes, not hours! Installs handles up to 12" C-C. With durable hardened aluminum and case hardened steel bushings, the patented design utilizes the highest quality materials to ensure repetitive accuracy and durability. For larger handles, optional extensions TP-2312 can be added to TP-1934 or purchased as a kit, item TP-1935. The attachments allow for handles up to 38" c-c (960mm) plus on-site 32mm shelf pin holes. Includes blow molded carrying case with stainless steel clasps and standard 5MM drill bit (approx. 3/16"). Made in USA. Fastest and most accurate jig on the market No clamping or marking, just hold in place and drill! Reversible for L or R drilling Durable hardened aluminum with lifetime warranty on hardened steel bushings Made in USA