Has precision located slots for accurate 45? and 90? cuts, and 3/16" thick case hardened sidewalls maintain this accuracy. The 3/4" thick soft base prevents blade dulling. Has three threaded holes in one sidewall to lock moulding in place with thumb screws. One sidewall is flush with the bottom of the base, and the other is 1/2" deeper to allow flush mounting against the front edge of a workbench. Two countersunk mounting holes are provided in the base and the miter box can also be mounted on a board for 'on the job' use. Measurements are 2" inside width x 11" long x 2-1/16" inside height. Supplied with two thumb screws. Weighs 5 lbs.