Feature

●1, [Set contents] 4-12 mm (4/6/8/10/12) 4-20 mm (4/6/8/10/12/14/16/18/20) 4-32 mm (4/6/8/10/12/14/16/18/20/24/24/2224/224/226/28/28/28/26/28/28/28/26/28/26/28/28/28 /30/3 2)
●2. Size: Hex shaft diameter 0.25 inch (6.35 mm) (3 pieces common)
●3. [Wide range of uses] This tool is an essential tool for drilling thin iron plates (small .4 mm), aluminum plates, wood, vinyl, resin, etc., for household DIY, enlarging the lower hole, chamfering, deburring, etc. Also suitable for cutting hardened materials such as hardened steel plates and stainless steel. A must-have item for home & work
●4. [Design Benefits] The spiral design reduces pressure when cutting, and allows for better discharge of the cutting power than conventional step drills and makes cutting smooth. Stair grooves prevent chuck from slipping
●5. Material: HSS steel (high speed steel) step drill has a titanium coating on the surface to reduce the heat produced during friction, and operate at a lower temperature


Description

1, [Set contents] 4-12 mm (4/6/8/10/12) 4-20 mm (4/6/8/10/12/14/16/18/20) 4-32 mm (4/6/8/10/12/14/16/18/20/24/24/2224/224/226/28/28/28/26/28/28/28/26/28/26/28/28/28 /30/3 2) 2. Size: Hexagonal shaft diameter 0.25 inch (6.35 mm) (3 units) 3. (Wide range of uses) Thin iron plate (small.4 mm), drilling aluminum plates, wood, vinyl, resin, etc.; An essential tool for household DIY, enlarging the lower hole, chamfering, deburring, etc. Also suitable for cutting hardened materials such as hardened steel plates and stainless steel. A must-have item for home & work. 4. [Design Benefits] The spiral design reduces pressure when cutting, and allows for better discharge of the cutting power than conventional step drills and makes cutting smooth. Stair grooves prevent chuck from slipping 5. Material: HSS steel (high speed steel) step drill has a titanium coating on the surface to reduce the heat produced during friction, and operate at a lower temperature.