EXCEL 20550 Jewelers Saw Blade #2 (12) Product Details Excel 20550 No 2 Jewelers Saw Blades 12 piece package 52 teeth per inch Size 5 1/8 inch long 0.12MT Use #70 drill bit for pilot hole to start inside cuts Made of carbon steel heat treated to 56-57 hardness Medium Duty for cutting wood, plastic, rubber, and thin metal Use Eurotool Cut Lube to extend jeweler saw blade life