The hardened, self-sharpening stainless steel blade and multitude of safety features makes this trimmer a cut above. Includes a patented automatic blade latch lock. Finger guard protects the entire length of the blade. Torsion spring prevents blade from falling. Permanent 1/2" grid and dual standard and metric rulers. 1/2" thick wood base. Manufacturers limited lifetime warranty (includes blade). All sheet capacities are based on 20-lb. bond. Trimmer Board Type: Bypass; Sheet Capacity: 15; Cut Length: 15 in; Trimmer Board Special Features: Alignment Grid. Quartet Paper Trimmer