Abstract: A cutting tool that has a body with an insert receiving a pocket at an extremity thereof and an insert on a support body which has surfaces complementary to support surfaces of the tool body and seated in the pocket. A cylindrical locking member is received in a bore that extends parallel to the pocket and a locking screw extends through the support body and through an open ended slot that joins the pocket and the bore and threadedly engages the locking member in such a manner that when the locking screw is tightened the insert and support member are locked into the tool body pocket and when the screw is loosened the insert, the support body, the locking screw, and the locking member can be removed from the tool body by sliding the same from the open ended slot.