Roberts Carpet Tools Heavy Duty Blue Slotted Blades 10-436 Fits Roberts 3 Cushion Back Cutter 10-463, 3 GT Loop Pile Cutter 10-152, Loop Pile Cutter 10-154 (2512-2102), Cushion Back Cutter with Row Finder 10-147, Multi-Purpose Wall Trimmer 10-905, Cut and Jam Carpet Knife 10-220 (2780-1026), Razor Blade Knife 10-215, Slotted Blade Knife 10-217, and most other brands 2.25-Inch x .017-Inch 10 per card Made in USA