Features: 1. Suitable for drilling holes in stainless steel, die steel, aluminum alloy, cast iron, copper, galvanized pipe and other metal materials 2. High hardness, wear resistance, accurate positioning, good chip removal and high efficiency 3. Only cold-rolled steel can be used, quenched and quenched and tempered steel are strictly prohibited.

Diameter	Total Length	Flute Length	Pcs/Box
3.0mm	45mm	15.5mm	10
3.2mm	49mm	16mm	10
3.5mm	52mm	17mm	10
4.0mm	53mm	17.5mm	10
4.2mm	55mm	18.5mm	10
4.5mm	55mm	18.5mm	10
5.0mm	60mm	20mm	10
5.2mm	60mm	20mm	10

Brand	Xinfa	Coating	No
Product Name	Double End Twist Drill	Standard	DIN338
Material	HSSCO	Use	Hand Drill

Tips for electric drill processing operation: 1. 12V lithium electric drill is not recommended because of low torque, 24V, 48V lithium electric drill is recommended. 2. When drilling, the drill bit and the stainless steel plate are perpendicular to 90 degrees, 3. If the hole is larger than 6mm, first use a 3.2-4mm drill to drill a small hole, and then use a large drill to expand the hole 4. The electric drill chuck must clamp the double-ended drill. The shorter the exposed part, the better. The cutting edge of the drill does not need to be too sharp or too sharp. 5. The speed of the electric drill should be between 800-1500. The effect should not be too large. 6. Before punching a hole, you can use a sample punch (or a nail instead) to punch the center point at the punching position first, and the drill bit will not deviate.