TREND SNAP/CS/4 SNAPPY COUNTERSINK DRILLBIT 3.5mmHeat treated tool steel countersink with a HSS drill. Adjustable for different length screws and can produce a 9.5mm (3/8 inch) diameter counterbored hole for woodplugs. The drill produce pilot holes only Specifications Rollover Image D 3/8 inch D 9.5 mm D2 5/64 inch D2 2 mm Shank Diameter 1/4 inch hex Screw size S/W n.a H/W No. 4
I think a little expensive for what it is
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