คุณลักษณะ

• The function of double-headed bit + 2 kinds of socket + extension joint can be performed by one.
• You don't have to carry many tools when you work in the field.
• It can lock securely and prevent loss.
• For siding, tightening of roof drill screws, extension of driver bits, and extension of drill bits.
• Ironwork drills are up to 6 millimeters, and woodwork drills are up to 12 millimeters.
• Socket bits cannot be concatenated.