Supply Of Twist Drill Hss Parallel Shank Type - N, Size 4mm Dia. To Is: 5101-1991 (reaffirmed 2001) And Is: 5099-2003, Grade Xt110mo10co 8cr4w2 To Is: 7291- 1981 (reaffirmed 2004) Makes: M/s. Indian Tool Manufacturers Or M/s. Addison & Co Ltd/chennai Or M/s. J.k.files (india) Ltd/ Mumbai Or M/s. Miranda Tools/mumbai