This complete set includes 4 HSS tapered countersink bits (2.8mm, 3.2mm, 3.5mm, 4.0mm centre drills), each paired with an 82° 4-flute counterbore (8mm for 2.8/3.2mm bits; 10mm for 3.5/4.0mm bits). Also includes a 1/4"" hex shank extension handle and a hex wrench for quick bit changes.
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