Rotary trimmer is engineered for performance and long-lasting service. Fully-enclosed, self-sharpening tungsten steel cutting wheel. Rotary trimmer has cast metal head and end supports. 7/8" thick grey melamine, warp-proof baseboard. Rotary trimmer has bi-directional cutting capability. Aluminum squaring arm calibrated in inch and metric. Cuts acetate, aluminum, cardboard, leather, mat board, paper, vellum, vinyl, much more (not foam board). Ships UPS.