[5  & 8  (16mm)]

[1  & 2 u201D(17mm)]

[3  & 4  (19mm)]

Package includes:1xReduced Shank Drill Bit
Weight:150g
Material:HSS
Cutting edge diameter: 17mm / 0.67 "; holder diameter: 1/2"
Reduced Shank: Reduced shank drill expands the size range capacity of a portable drill chuck. Common flute and overall length for minimal adjustment during tool changes
Black oxide treatment adds lubricity and creates small pockets on the surface of the tool that act to hold coolant near the cutting edge
Hex shank, which is suitable for most drills,fit for electric screwdrivers, hand screwdrivers, electric drills, air drills and so forth.