Designation Description Page T-Clamp Ultra tool holders for turning and 1334 THR/L211 grooving T-Clamp Ultra tool holders for ID Turning 1336 THR/L619 and grooving Triple corner insert for shallow grooving 1338 TTG (Lever Lock) Triple corner insert for shallow grooving 1339 TTG (Screw Clamp) External shallow grooving holders 1340 TGTER/L (Lever Lock) External shallow grooving holders 1341 TGTER/L (Screw Clamp) Internal shallow grooving holders 1342 TGTIR/L 1303