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 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.