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 SystemTM. Safety features include blade-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; Sheet Capacity: 20; Cut Length: 24"; Blade Material: Hardened Steel.