TOOLING SYSTEMS INTRODUCTION Recommmended Toolholder for Different Shank Types SRK/SRKIN CYLINDRICAL SHANK ER COLLET CHUCK  DIN 6499 CYLINDRICAL SHANK MAXIN POWER CHUCK CYLINDRICAL SHANK EM (DIN1835 FORM A/B) WELDON SHANK EM E (DIN1835 FORM E) WHISTLE NOTCH SHANK 2˚ 561