Description of Utoolmart Titanium Chamfer Chamfering Countersink
[6in1 Set]: Diameter: 6.3mm/0.25", 8.3mm/0.33", 10.4mm/0.4", 12.4mm/0.5", 16.5mm/0.65", 20.5mm/0.8". [Universal Shank]: Round shank fits most handheld and stationary drills. [3 Flute Design]: Three flutes design reduces vibration for smoother drilling and extended life. [90 Chamfering Degree]: Precision ground 90 degree tip for countersinking most machinable metals like aluminum, woods, rubber and plastic. [Wide Application]: Suitable for aluminum, brass, bronze, iron, plastic, thin iron plate, wood, insulation board, PVC board etc.