6 Pcs Countersink Drill Bit - HSS
. Material : #4341 High Speed Steel
. Size : 6.3, 8.3, 10.4, 12.4, 16.5, 20.5mm
. For : Metal , Aluminium, Wood, Plastic
        Iron Sheet, Insulation Board
. Cutting : 5 Flute 90˚
. Code : CS6M
. A set of HSS (High-Speed Steel) 90-degree countersink drill bits commonly used for chamfering and deburring metals and wood.
. Design: These bits feature a 3-flute design to help reduce clogging and improve clearance for smoother, chatter-free cuts.
. Sizes : The set includes multiple sizes, ranging from larger diameters like 20.5mm down to smaller options such as 10mm and 3.5mm.
. Coating : The gold-colored coating is likely Titanium Nitride (TiN), which helps increase the hardness and heat resistance of the tools.