WIOR Step Drill Bit 5pcs High Speed Steel Step Drill Bit Set with Double Cutting Blades Design Professional Unibit with Aluminum Case for Drilling Holes on Metal Aluminium Wood-Total 50 Sizes

WIOR step drill bit set with 50 sizes can replace 50 individual bits, which is capable to drill holes of various sizes at one time, saving your time and efforts to change bits. More Features: ? 50 Sizes in 5 Pieces--5 standard step drill bits can drill 50 different sizes of holes on different thicknesses of materials. ? Premium Material--Made of titanium coated high-speed steel, sturdy and durable. ? Universal Shank Design--Prevents slipping in drill chunk and reduces shocks. ? Increased Cutting Speed--The split point is at 135° which allows you to cut faster and the two flute design also lets the material particles escape easily. ? Widely Use--Can be used to chamfer, drill, or enlarge holes in a plastic, wood, aluminum, copper, iron sheet, and more. Specification: Material: High Speed Steel Color: Bronze Size: 5.9'' x 4.5'' x 1.6'' Weight: 1 lb/458g Step Sizes: Bit #1 (10 STP): 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8” Bit #2 (12 STP): 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8" Bit #3 (9 STP): 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4" Bit #4 (13 STP): 1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2" Bit #5 (6 STP): 3/16", 1/4", 5/16", 3/8", 7/16", 1/2" Notes: ?The thickness of the subject you are going to drill on shall NOT exceed the height of each increment of the step drill bit. ?The drill bit set is not suitable for hard and brittle materials such as stainless steel, glass, tile floors, walls, etc. ?Friction will accumulate heat between bits and the material. Pay attention to the heat, add water or coolant if necessary. Package Included: 5*Step Drill Bits 1*Alumium Case If you have any questions or confusion about the product, please feel free to contact us.