supply of twist drilltwist drill,drill socket 2:3 conforming to is:6682-1991 [ warranty period: 30 months after the date of delivery ] ] , twist drill, morse taper shank no.2, high speed tool steel, dia 21.50mm, overall length 248mm, flute length 150mm, to is:5103-1969 amendment no.3 of 1996 or bs:328 (part-1) 19 86 (make addison or jk only). [ warranty period: 30 months after the date of delivery ] ] , twist drill, morse taper shank, shank no.3, high speed tool steel, dia 23.50mm,o verall length 276mm, flute length 155mm, to is:5103-1969 amendment no.3 of 1996 or bs:328(pa rt-i)1986. make addison or jk only. [ warranty period: 30 months after the date of delivery ] ]