[Most Popular Specification on The Market] 1 pc keyed zinc mortise cylinder 1pc thumb turn mortise cylinder for Adams Rite storefront deadbolt, hookbolt or deadlatch door locksets [Most Common Set] 1 pc keyed cylinder and 1 pc thumb turn mortise cylinder as a pair [For Commercial Storefront or Shopfront Used] Glass doors with narrow stile aluminum frame used [Common and Complete Set] SC Keyway w/ 2 brass keys, 5 pins+ thumb turn mortise cylinder [Standard Size] 1-inch length , standard 1-5/32" diameter mortise cylinders For Commercial Storefront or Shopfront Used, Glass Doors with narrow stile aluminum Frame Used