By virtue of the inserts being triangular, the curved corners on the cutting edges of the two inserts may be positioned relatively close together and yet sufficient space is left between {TAIL ~ the inserts} to enable the drill shank between the inserts to be relatively thick and strong even at {HEAD ~ increased length} to diameter ratios 
By virtue of the inserts being triangular , the curved corners on the cutting edges of the two inserts may be positioned relatively close together and yet sufficient space is left between { TAIL ~ the inserts } to enable the drill shank between the inserts to be relatively thick and strong even at { HEAD ~ increased length } to diameter ratios
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