Step Drill Bit Set, High Speed Steel Titanium Coated, Spiral Grooved HSS Cone Cutter, Hex Shank, Power Tools for Wood Metal Stainless Aluminum Hole Cutter, 4mm to 12/20/32 mm (5/32" to 5/4"), 3 PCS

Description

Attention: Please cool down with water when working because of the high temperature, so that it can last longer. The speed is advised to be 250-400 rpm / min. - Unique step design : a drill bit can be used to open holes of various sizes, means the equivalent of a box of drill. - Two-fluted design can provide faster, smoother cutting. - High speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance - A terrific helper to be used for deburring, chamfering, expanding hole - Durable to use, stable, working witout pre-working. - Packed in a Nylon Bag, offering good protection. Usage: Aplly in gun-drilling, bench drill Type: Step Drill Head Type: Hexagon Shank Quantity: 3PCS Material: High Speed Steel Surface Treatment: Titanium coated The 3 Cutters Sizes: 9 step drill bit: 4-12mm (4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm) 9 step drill bit: 4-20mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm) 15 step drill bit: 4-32mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm) Package Include: 3 Pieces Step Drill with Nylon Bag