3 Piece HSS Step Drill Bit Set with Titanium Coating, Universal Hex Shank, 4mm-12/20/32mm with Nylon Bag for Plastic, PVC, Wood, Metal, Aluminum, Copper

【Premium Quality】These step drill bits are made of super strong HSS steel and titanium coated, the titanium coating ensures easy cutting of steel, aluminum sheet, brass, copper, plastic , wood and many other kinds of metal.

【Various Sizes】This step drill bit set has 3 kinds of sizes, the dimensions of the step cutter for metal are: 4–12 mm, 4– 20mm, 4-32mm, can meet your needs in different situations

【Universal hex shank】6.35mm hex shank works with most drills or drills with 6.35 chuck mm, fits power tool chucks securely and prevents slippage.

【Application】Widely used for cutting holes in a variety of materials such as plate, aluminum, panel insulation, PVC panels, wood thickness is less than 5mm.

【Package Content】1 x 4-12mm, 1 x 4-20mm, 1 x 4 -32mm.