Wood Drill Bits with Centring Tip : 1) High carbon steel with carbide tipped cutting edge 2) Black groove and ground flute 1) High carbon steel with carbide tipped cutting edge 2) Black groove and ground flute3) Straight Shank4) Applied in all kinds of plywood, softwood, hardwood, MDF, etc5) Size avilable in 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, and 25mm. wood drill bit