1pcs high quality golden diamond core drill bit hole opener for marble, concrete, granite, glass, tile, masonry drilling drill bits
specification:
100% quality and brand new.
name: golden diamond drill bit
material: high quality emery material
type: core drill bit
length: 40mm
hole diameter: 40mm
shank shape: 6-18mm is round shank, 40mm is triangle shank
shank diameter: 6-18mm is 6-9mm, 20-65mm is 10mm
application: suitable for marble, concrete, granite, tile, glass, etc