คุณลักษณะ

• Even when the hexagonal part of the bolt/nut is badly scratched or rusted and cannot be turned with a socket or a glasses wrench, it can be firmly inserted and turned.
• For right screw loosening only (for left rotation only).
• Loosening work for bolts and nuts whose hexagonal parts are severely damaged or rusted.
• Do not use for power tools such as impact wrenches.