Built to stand up to frequent use. X-acto® hardened steel blade. Perpetual Edge Self-Sharpening System. Safety latch and safety guard. Durable 3/4" thick base features English and metric grids. Dual rulers. Easy grip handle. Non-skid rubber. Manufacturer"s limited ten-year warranty. All sheet capacities are based on 20-lb. bond. Built to stand up to the frequent use in busy office and school environments. X-ACTO® hardened steel blade stays sharp with the Perpetual Edge Self-Sharpening System. Safety features include trigger-lock safety latch and safety guard. Durable 3/4" thick base features standard and metric grids and adjustable paper guide. Dual rulers for convenient measuring. Easy-grip handle helps increase your cutting power. Non-skid rubber feet prevent slipping. Trimmer Board Type: Bypass; Global Product Type: Trimmer Boards-Bypass; Sheet Capacity: 18; Cut Length: 18 in.