| 摘要 |
PROBLEM TO BE SOLVED: To provide a drill-bit annexed tool capable of fastening when a member is fixed by a cross-recessed screw, without replacing the drill bit used for the drilling by a screwing crisscross bit.SOLUTION: A drill-bit annexed tool 1 is equipped on one end portion with a crisscross head 3 and on the other with a hexagonal hole 4 to be fitted on a hexagonal shank of the drill bit, and a shank gripping mechanism 2 for keeping the shank-mounted state. The drill-bit annexed tool 1 is mounted, when used, on the drill bit mounted and gripped on an electric tool or the like. |
