上次用HD那个红色的钻石drill bit (https://www.homedepot.ca/product/milwaukee-tool-1-4-inch-diamond-plus-hole-saw-w-arbor/1000805223)才打几个孔就磨损殆尽,而且效率极低。我也一直用水浇了。哪位高人推荐一款更专业的drill bit?
上次用HD那个红色的钻石drill bit (https://www.homedepot.ca/product/milwaukee-tool-1-4-inch-diamond-plus-hole-saw-w-arbor/1000805223)才打几个孔就磨损殆尽,而且效率极低。我也一直用水浇了。哪位高人推荐一款更专业的drill bit?