About this product
This set includes 16 stone drill bits made from #45 carbon steel with a tungsten carbide YG8C tip. The bits have a hardness of HRC42-48 and HRA88-90, with sizes including 3.0mm, 4.0mm, 5.0mm, 6.0mm, 8.0mm, and 10.0mm.
This set includes 16 stone drill bits made from #45 carbon steel with a tungsten carbide YG8C tip. The bits have a hardness of HRC42-48 and HRA88-90, with sizes including 3.0mm, 4.0mm, 5.0mm, 6.0mm, 8.0mm, and 10.0mm.
