Mengshen HSS High Speed Steel Step Drill Bit 3-Piece Set 4-12mm/4-20mm/4-32mm, Nitride Spiral Flute Triangle Handle Pagoda Drill for Carbon Steel, Sheet Iron, Insulation Boards,PVC Boards,Planks

• High Speed Steel - Suitable for below 25 hardness of the work piece, such as carbon steel, sheet iron, insulation boards, PVC boards, planks, and wood thickness below 5MM.
• Titanium Coating - Coated with titanium, this step drill set performs well in heat, corrosion and rust resistance.
• Good Design - Triangle shank fits into power tools chuck securely and eliminates slip; two-flute design clears chips faster and allows particles to escape easily.
• It can automatically deburr holes while drilling to keep the drill bit clean.
• A necessity for family or handyman or professionals - Perfect for home repairs and light jobs such as drilling holes in plastic, aluminum, copper and many other types of sheet metal.

Mengshen Nitride Step Drill Bit is made of high speed steel together with titanium coating , which lasts the bit a long using life. Features: 1. High speed steel for longer service life; 2. Triangle shank prevents slip in drill chuck; 3. Double cutting blades design enables a faster and smoother cutting; 4. The advanced double spiral flute design outperforms straight flute design and extends the life of the bit. The split point tip increases speed, and they also include laser-engraved measurements to increase step visibility. 5. The sharpness ensure easily cut through most sheet metal, plastic and some other materials with ease. Specifications: Material: High speed steel Sizes of the 3 Step Drill Bits: 5 Step Bit 4-12mm 9 Step Bit 4-20mm 15 Step Bit 4-32mm Package included: 3 x Drill Bit