Specification
10Pcs 38mm/1.5inch Diamond Glass Drill Bit in a Pack
Material: Carbon Steel, Diamond Particles Coated
Cutting Diameter: 38mm/1.5inch
Shank Size: 24 x 10mm / 0.94 x 0.39inch (L*D)
Total Length: 56mm/ 2.2inch
Packing Weight: 117g
Packing Size:12x8x3.8cm
1. Not for use on Concrete. Water or Coolant is required when drilling, or the diamond core drill will burn
2. The general rule is the smaller the diameter of your drill bit, the faster drill speed you can use. The harder your material, the slower drill speed you should use.
3. They can drill slate marble, but only for a few holes, because diamond would wear off easily and shorten its work time.
Kindly Note: Please allow 1-2cm errors due to manual measurement, thank you for your understanding!