For shafts without groove, For self-locking Seeger grip rings and for self-locking Benzing clamping rings, Similar to DIN 5254 Form A, A 0G - A 1G = 30B0 angled jaws, A 2G = straight tips, With opening spring and adjusting screw to limit opening, High degree of assembly reliability, the limit opening rules out any over-tensioning of the smallest of retaining rings, Forged GEDORE chrome-vanadium special hardened and tempered steel, Precision machined, oil hardened and annealed, Black, with red dipped handles