SRDCN EXTERNAL TOOL HOLDER WITH SCREW CLAMPING FOR POSITIVE ROUND INSERTS f b l1 L h h Designation h b l f SRDCN10-3A 0.625 0.625 4.000 0.312 SRDCN12-3B 0.750 0.750 4.500 0.375 SRDCN16-4D 1.000 1.000 6.000 0.500 For inserts, see pages 971, 991. HARDWARE Accepts Insert Series Seat Insert Screw Seat Screw Torx Driver SRDCN10-3A RC_T10T300 3811(SEAT) 1335 1750 5516 SRDCN12-3B RC_T10T300 3811(SEAT) 1335 1750 5516 SRDCN16-4D RC_T120400 3814(SEAT) 1335 1750 5516 1072