Configuration:Keyed individually, Finish:Lifetime Brass (PVD) Baldwin"s low-profile cylinder deadbolts feature heavy-gauge steel cases for security and solid brass mechanisms for smooth operation. When extended, the deadbolt has a 1" throw, which reaches into a saw-proof, hardened steel insert. Available keyed alike in sets of four, and in patio configuration (with deadbolt is operated by inside turnpiece only).See options to choose configuration and finish. Adjustable backset fits both 2-3/8" and 2" backset measurements. Designed for 1" thick doors. Spacers available for 1-3/8" doors; see accessories. For thicker doors, use accessory conversion kit. Meets ANSI Grade 1 security requirements. Bolt comes in either Aged Brass or Satin Chrome to match trim.Note: Designed especially for 2-1/8" diameter cut-outs. Door Hardware Planning & Measuring Guide