... service life 3.Better chips clearance 4.High precise drilling Bimetal Hole Saw isdesigned to cut accurate holes in ... 64'').It is widely used in portable electric drill, air tools, hydraulictools, drill presses, lathes, boring mills, milling machines. ... drill machines, lathe machine, boring mills.5. Supplied in various width, tooth type, and tooth pitch.Available Size bimetal hole saw for drilling ...