BT-EM(SHORT) : Short weldon DIN6359 / DIN 1835 form B end mill holders with BT MAS-403 form AD taper shanks
  DesignationSSd2D1LL1GkgGICATGIREMgiic
  BT40 EM 25X45 4025.0063.0045.00-M161.184601585 0

Add B for coolant through flange