Aloris Double-Lock Tool Holders.A unique locking devices exerts a two-way force on the carbide insert: downward and tight against shoulder to assure rigid, positive seating.Available in right or left hand versions and designed to accept standard insert.Dimensions (see image) A: 5/8″; B: 5/8″; C: 41/2″; D: 9/16″Insert Size: I.C.: 3/8″; thickness: 1/8″Replacement Parts:*Carbide Seat ST-1.*Hex Lock Pin LP1.*Lock Screw LS-1.*Carbide Seat ST-2.*Hex Lock Pin LP2.*Lock Screw LS-2.*Carbide Seat ST-3.*Hex Lock Pin LP3.*Lock Screw LS-3.