I joined the "Blade Club"! My son took me to Harbor Freight, I found the Carpet Cutting blades and bought 2 packs. 2 blades per pack for 1.99! I have been paying 5.95 EACH for 45mm rotary blades! So, the way I figure it: 4 blades X 5.95=23.80-(2x1.99=3.98)= 19.82 to spend on new fabric! Whew too much math so early in the morning......