| 摘要 |
PROBLEM TO BE SOLVED: To provide a driver bit, which can improve a strength and an abrasion resistance of a tip edge part and can absorb an excessive torque or an impact extremely efficiently, has extremely excellent durability, and can be easily manufactured with a simple structure.SOLUTION: A driver bit is constituted such that an intermediate part and an other end part of a driver bit body 12 excepting a tip edge part 14 are integrally coated-molded of a resin material 20 having a desired thickness in its entirety. |
