Bulk Packaged Excel 22692 - 100pc Heavy Duty Standard Utility Knife Blades. These blades come in a handy dispenser that can be mounted on a wall. To fit Excel K9 (both ends of blade are useable). For all general purposes, cutting corregated boxes, plywood, leather, plastic, and sheetrock. Size: 2 3/8 x 3/4 x 2 3/8 inch edge. Works with all standard utility knife handles. Made in USA.