Quick Blade Change with Flip of the Lever Comfortable Grip Adjustable Blade Length This CRL UltraWiz Lever Action Windshield Knife is the perfect choice to accompany UltraWiz super sharp blades. The lever action allows for easy adjustment to the blade length for all applications. All UltraWiz Handles are shaped for comfort and gripping power, and will hold any standard size 3/4 inch (19 millimeter) cold knife blade. This knife comes with one AN1001 standard 3/4 inch (19 millimeter) blade installed. Additional Product Information: For ultra fast cut outs while using this knife optional blades are also available, CRL Ultra Wiz Ultra Thin Blades AN5001 3/4 inch (19.1 millimeter), AN5002 one inch (25.4 millimeter) or AN5004 1-1/2 inch (38.1 millimeter