Deli Twist Drill Bit Concrete Metal Drilling Stainless Steel Hole Opener Electric Drill Professional 13-Piece Set

Suitable for drilling thin stainless steel plates, iron plates, carbon steel, cast iron, aluminum alloy, and copper materials

Compatible with electric drills, lithium battery drills, drill presses, and milling machines

Electric drill power ≥ 750W; charging device voltage ≥ 24V

Select drill bit size according to the machine’s processing hole diameter for drill presses

Maintain 90° perpendicularity between drill bit and stainless steel plate during drilling

Use larger drill bits for step drilling and hole enlargement

Securely clamp the drill bit shank; shorter drill bits preferred

Apply even force and stabilize the base during drilling

Straight shank with working part consisting of two main cutting edges and secondary cutting edges

Guiding section for alignment and wear resistance

Spiral chip groove design for efficient chip removal