| 摘要 |
PROBLEM TO BE SOLVED: To provide an easy-to-repolish mountain or valley tip firmly fixed to a tooth base. SOLUTION: The bottom face 31a and the back face 31b of a cutter 31 formed in a mountain or valley shape in a front view with a hard element material including a diamond sintered body and a CBN sintered body are integrally surrounded by the bottom side 32a and the rising side 32b of a holder 32 formed in a sectionally L-shape almost similar to the shape of the cutter 31 in a front view with a metal material.
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