[1]APPLY TO - Bi-Metal M42 High Speed Steel material hole saw contains 8% cobalt, suitable for drilling thick stainless steel (8mm or less) and general metal sheets(12mm or less). Not recommended for wood and plastic. Works effectively with hand electric drills, bench vertical drills and portable magnetic base drills; a large number of applications in plumbing, electrical engineering and a variety of drilling work[2]SPECIFICATION - Hole Saw Diameter 120mm (4-23/32"), Cutting Depth 30mm (1.18"), Shank Diameter 7.5mm (0.3"), Total Length 94mm (3.7") with Triangular Shank, with 1pc Center Drill Bit Diameter 6mm (0.24"), with 1pc Hex Key.[3]DESIGN - Surface Hardening Treatment (Nitriding + Paint Coating) - Provides the surface of the hole saw with high wear resistance, smooth and rust prevention[4]ADVANTAGES - Our Bi-Metal hole saw are heat-treated (Quenched + Tempered) - to increase the hardness, strength and wear resistance of the Bi-Metal hole saw, thus extending service life and improving machining efficiency[5]EXPAIN - Need to rotate the center drill to make it fixed, use the hex key to align the locking pin with the hole of the of the center drill, tighten and fix it on the tool could be used, at the same time, you need to pay attention to the installation of the spring. Pay attention to keep the vertical state
