Class 2 25941 - Key LockingGreen stripes indicate Security Grade 3 to BS EN 12320. 25943 - Key Locking Extended ShackleGreen stripes indicate Security Grade 3 to BS EN 12320. 25946 - Key Locking 10mm Dia. ShackleGreen stripes indicate Security Grade 3 to BS EN 12320. 25949 - Key Locking Closed ShackleGreen stripes indicate Security Grade 3 to BS EN 12320.