棘轮效应或齿轨一致螺丝刀

12-IN-1 RATCHETING SCREWDRIVER SET 5 way pivoting head ratcheting driver for driving screws in close quarters, where high torque is required Instant bits storage system for maximum convenience and eliminates bit loss Magnetic extention bar Product #DescriptionPackingUnit PackCase3400112-in-1 ratcheting screwdriverclam shell624 27 PC RATCHETING SCREWDRIVER SET 1-5 way ratchet screwdriver 1-precision ratchet screwdriver 1-bits driver(60mm) 12-precision bits (28mm) 12-bits (25mm) 5 way pivoting head ratcheting driver for driving screws in close quarters, where high torque is required Instant bits storage system for maximum convenience and eliminates bit loss Product #DescriptionPackingUnit PackCase3400227 pc ratcheting screwdriver setclam shell520 12-IN-1 RATCHETING SCREWDRIVER 5 way pivoting head ratcheting driver for driving screws in close quarters, where high torque is required Instant bits storage system for maximum convenience and eliminates bit loss Convenient bits storage case Product #DescriptionPackingUnit PackCase3400512-in-1 ratcheting screwdriverclam shell624