Unbreakable base stands up to the heavy use of busy offices and schools. Self-sharpening stainless steel blade. Patented automatic blade latch lock. Finger guard. Torsion spring prevents blade from falling. Permanent 1/2" grid and dual standard and metric rulers. 1-3/8" thick molded plastic base. Non-skid rubber feet. Manufacturers limited lifetime warranty (includes blade). All sheet capacities are based on 20-lb. bond. Trimmer Board Type: Bypass; Sheet Capacity: 10; Cut Length: 18 in; Trimmer Board Special Features: Alignment Grid. P218x