| Mã gốc | Dùng cho bu lông (mm) | Mũi khoan mồi |
| mm | mm | |
| 49 -A | 3,,,24 | 1.8-2.5-3.7-5.5-7-10 |
Chrome vanadium steel.
Square for operation with a tap spanner and an open-end spanner.
To turn off worn bolts with right-hand thread, etc., in a set.
Fine grooves offer better traction for convenient operation.
Bore out broken off bolts based on diameter.
Screw in the bolt extractor.
Do not use any electrical or pneumatic servo screwdrivers or hammer drills.
Protective blanket required.
