倒角刀

倒角刀

hss-countersink-impact
hss-countersink-round-shank
hss-countersink-impact
hss-countersink-round-shank
配合緊固螺絲製造沉孔, 使螺絲頭可與材質表面平行或隱藏於表面之下

去除金屬材料鑽孔後表面的毛刺,孔邊美觀
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