High Speed machine (above 8500 r.p.m.) is recommended for operating these drills. All size of the drills can be fitted in angle grinder or hand/ fixed drill machine as required.
We manufacture aforesaid drills in all the dia, varying from 12mm to 50 mm. Normally, the shank length of the drill are 50 mm (i.e. for hole depth upto 50mm ) which can even be increased as per individual requirements ( i.e. 60mm, 75mm, 90mm etc.)