烧结直柄钻头：适用于玻璃、陶瓷、宝石等硬脆材料的钻孔。
Sinter type straight-handle drills: Use for drilling hard and brickle material, such as glass, ceramics, jewellery etc.
有直柄钻头和螺纹柄钻头之分，螺纹柄分为内螺纹和外螺纹。
The core bit includes shank and thread, which consists of male thread and female thread.
有直柄钻头和螺纹柄钻头之分，螺纹柄分为内螺纹和外螺纹。
The core bit includes shank and thread, which consists of male thread and female thread.
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