HIGH SPEED STEEL TWIST DRILL PARALLEL SH [ HIGH SPEED STEEL TWIST DRILL PARALLEL SHANK" JOBBER SERIES" 4. 2 MM DIA TO BRANDS ADDISON/ SRP/ ITM ONLY & TO SPECN IS: 5101/ 91 ( REAFFIRMED 2001 ) AND IS: 5099/ 2003. as per Drg. No.- as per Specn. SPECN IS: 5101/ 91 ( REAFFIRMED 2001 ) AND IS: 5099/ 2003. ]