Dimensions Description: length: 130 mm 1# diameter 0.7mm pitch 0.210mm 2# diameter 0.85mm pitch 0.235mm 3# diameter 0.9mm pitch 0.255mm 4# diameter 0.95mm pitch 0.270mm 5# diameter 1.05mm pitch 0.290mm 6# diameter 1.13mm pitch 0.315mm 7# diameter 1.28mm pitch 0.345mm 8# diameter 1.35mm pitch 0.370mm. Uses: Used to cut all kinds of soft and hard wood, wood, carbon steel, copper, aluminum and other metals, but also saw plastic, acrylic board, etc., just different speed. Note: Saw blade should be tight, otherwise it is easy to break.