Already have our original PRO-LOK IN-Series Installation Templates? Simply purchase the new Pro Series Clamp (INCL-PRO) and an additional corresponding outside template for more accurate and efficient installations every time. Made in the USA The new INCL-PRO: Professional Series Universal Clamp is the cornerstone of our modular PRO-LOK IN-Series Installation Template system. It is designed to hold both (2) the front and back specialty IN-series Installation Templates at one time, for one easy set-up and lightening fast door prep! The upgraded clamp holds the Installation Templates in full contact with the door to reduce the chances of installation errors, damage to the door finish or misalignment Easy to use on 1-3/4" wood or metal doors with a 2-3/4" backset or adjustable for other size doors with adapter accessories Made from lightweight aluminum and featuring three sure-grip knobs.