Base width: 1-1/2″ Base height: 1″ Overall height: 4-7/8″ Lbs. pull: 25 Locking screw and 2 universal ball sockets for setting at any angle or position Microfine adjustment screw Removable extension arm 3-9⁄16" Use with or without arm Dovetail form holder with locking control to hold dovetail test indicators Accepts .250" diameter test indicator stems Base finished in wrinkled enamel