Fixinus 3 Pack HSS Titanium Coated Step Drill Bit Set, 1/4" Hex Shank Quick Change High Speed Steel Cone Drill Bits For Wood, Plastic, Sheet Metal Hole Drilling - Metric 4-12mm/4-20mm/4-32mm

4-20 9 Steps(Diameter 4, 6, 8, 10, 12, 14, 16, 18, 20mm) QUALITY MATERIAL HSS step drill bits are constructed from traditional HSS combined with a titanium nitride coating to make them even more durable. DESIGN 118° X-type Split Point - Increases cutting speed with self-centering and prevents walking. Hex shank will not spin inside the chunk, compatible with different types of drill machines effectively. FRIENDLY REMINDER Not compatible with hammer drill. It is recommended to oil the bit before every use. Please drill a smaller hole to make drilling smoother. When inject cold water while working, can effectively extend the service life of the drill bit. Our Service: If you are not fully satisfied with our product for any reason, We promise you we will offer our greatest sincerity to help you solve the problem. 【Material】Made of high speed steel with titanium coating, ensure our step drills’ Durability. This also proves the capability and durability of the drill to last through multiple drillings on surfaces such as: plastic, aluminum, copper, stainless steel, and so much more. 【Easy Drilling】Two-fluted provide small pressure and make your drilling faster and smoother , a step drill can be used in a variety of hole sizes. 【SET INCLUDES】Bit #1 (5 steps): 4-12mm (4mm, 6mm, 8mm, 10mm, 12mm); Bit #2 (9 steps): 4-20mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm); Bit #3 (15 steps): 4-32mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm,30mm,32mm) Not suitable for hard and brittle materials such as stainless steel, glass, tile floors, walls etc. 【Package Included】 3-Piece HSS Step Drill Bit (4-12/ 4-20/ 4-32mm ) . 1/4 Hex shaft drives are suitable for all kinds of for home DIY power drills.