Indexable drill dia. 21. 0 mm, connection dia. 25 mm with flat for side lock. axial through coolant, Peripheral insert for indexable drill dia. 21. 0 mm, square shape with chip breaker, fixing hole, Center insert for indexable drill dia. 21. 0 mm, square shape with chip breaker, Insert screw suitable for clamping of peripheral & center insert of fixing hole dia. 2. 8 mm on index, Key/ Spanner suitable for clamping of peripheral & center insert of fixing hole dia. 2. 8 mm on indexab