Trimmer features a unique dual-rail system that stabilizes the rotary blade, eliminating wiggle. Makes straight, perfectly precise cuts on a wide range of thick materials. Spring-action rotary bypass blade stays sharp and never needs to be replaced. Additional innovations include a built-in smudge guard and top quality work surface for long-lasting performance. Grid line measurements on the top and bottom allow you to use the base to your left or right. Convenient folding design takes up less space during storage and transport. Trimmer Board Type: Rotary Bypass Sheet Capacity: 20 Cut Length: 12 1/2" Blade Material: Titanium-Coated Steel. Unit of Measure : Each