HSS Step Drill Bits Set, Bst4UDirect 4 PCS High Speed Steel Titanium Coated Cone Drill Bits Hole Cutter for Wood, Stainless Steel, Sheet Metal

TITANIUM COATING: High-quality HSS steel and titanium-coated high-speed steel make it last longer. Ensures easy cutting, ultra-durable, reduce friction and heat, excellent in heat resistance, corrosion resistance and rust preventionUNIQUE 2-SLOT DESIGN: The two-slot design also makes it easy for material particles to escape, thus making the drilling operation cleaner. The 118-degree bifurcated tip provides faster cutting speed and prevents slippageAUTOMATIC CENTER PUNCHING: Can realize automatic, high-impact, spring-loaded impact by adjusting the cover. Only a small amount of pressure is required to automatically punch holes when drillingACCELERATE THE CUTTING SPEED: The four flat shank Provide fast, each step is clearly marked with the depth diameter. The required size can be easily determined by comparing the laser engraving size in the groove of the stepped drill bitWIDE RANGE OF APPLICATIONS: High-speed steel and titanium coating ensure easy cutting of most steel plates, widely used to cut holes in various materials, such as thin iron, thin aluminum, plastic, PVC board, suitable for workpieces with hardness below 25 °, Such as carbon steel, the thickness of the plate is below 5MMSize:5-35mm (5, 7, 10, 12, 15, 17, 20, 22, 25, 27, 30, 32, 35mm)4-32mm (4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32mm)4-20mm (4, 6, 8, 10, 12, 14, 16, 18, 20mm)4-12mm (4, 6, 8, 10, 12mm)Note:When using an electric drill, be sure to wear goggles, masks and gloves.Do not touch it with your hand, because the electric drill will generate heat when in use and there is a danger of burning.When using pistol drill and bench drill, water injection and cooling while working can effectively extend the service life of the drill bit. The recommended drilling speed is 250-400 rpm.

• HSS & TITANIUM COATING: Step cone drill bits are made of high-speed steel, titanium nitride coating can reduce frictional heat, and the operating temperature is low, strong and durable; titanium coating ensures free cutting steel, aluminum plate, brass, copper, plastic Wood, etc.
• EASY TO DRILL: The two-slot spiral groove design prevents slippage, quickly removes chips and deburrs the hole, the pressure is small, drilling and cutting are faster and smoother; it can achieve faster, more stable and smoother cutting The hole can be chamfered automatically to clean the drill bit.
• LONG LIFE AND CONVENIENT USE: High-speed steel, through heat treatment and tempering, makes the step drill bit have the function of long-term use; the step drill can easily cut multiple sizes of holes with one drill bit, without constantly changing the drill bit.
• USES: Suitable for home DIY and general building supervision / project use. Widely used for cutting various materials such as wood, plastic, thin iron plate, thin aluminum plate and so on. It is suitable for workpieces with hardness below 25 °, such as carbon steel, with plate thickness below 5MM.
• HEX SHANK: 1/4 "(6.35mm) hex shank is suitable for most drills or drills with 1/4" chuck, can be firmly installed in the power tool chuck and eliminate slippage.