inner hexagon extendable Conversion head

1/2 square hole to 1/4 hexagon hole

advantage:

1. Telescopic elastic sleeve changeover head, convenient for replacing the screwdriver head

2. Applicable to various electric wrenches 1/2 pneumatic wrenches

3. The concave is a four corner design, which increases the contact surface and reduces wear

Installation method:

1. Pull the self-locking head backward

2. Put the screwdriver into the bottom

3. Loosen the elastic sleeve and return it to the original position