Unbreakable 1 3/8-inch base stands up to the heavy use of busy offices and schools. Self-sharpening stainless steel blade. Patented automatic blade latch locks with every cutting motion. Finger guard protects the entire length of the blade. Torsion spring prevents blade from accidentally falling. 1/4" grid and standard and metric rulers help ensure proper alignment. Non-skid rubber feet. Trimmer Board Type: Bypass; Sheet Capacity: 10; Cut Length: 15"; Blade Material: Stainless Steel.