This industrial knife is designed specifically for thick materials like foam and fiberglass insulation. With an industrial-strength zirconium oxide blade, it lasts up to eleven times longer than knives with comparable metal blades. This keeps workers more productive for longer. Use either the installed rounded-tip blade or an optional pointed-tip version: both are finger-friendly® and safe to the touch, reducing workplace injuries. With a cutting depth of up to 76 millimeters (approximately 3 inches) the 10560 handles thick materials without dulling quickly or tearing. Blade auto-retracts when slider is released. No-tool blade change mechanism allows user to switch blade orientation for left-handed use.