Metal Cartridge Auto Lock.
Cartridge accommodates up to 6 blades (PAT.). Durable and light aluminum die-cast grip.
Double-lock system of Auto-Lock slider (Ratchet-lock slider) and screw stopper.
Applicable holder/Spare blade :
BL-300, BL-300e, BL-150P, BL1P, BL-10P, BL-50P, BL-2300, BL-3000, BL-3000-ON, BL-450