SIR0625P16 Internal Index able Threading Tool Holder (2302-0625) ~ Shank is 5/8". ~ Overall length (L) is 7". ~ Minimum bore is 0. 75". ~ F is 0. 45". ~ Insert I. C. is 3/8". ~ Replacement insert is the 16IRAG60 (#6007-0012). ~ Insert screw is the M3. 5 X 8 (#2100-0073). ~ Wrench is the T15 (#2100-0095).