Countersink Step Drill Bit Set

This is a Great Titanium Step Drill Bit Set Spiral Grooved Step Drill Bit with an Automatic Center Punch & Protective Aluminum Case. The HSS & TITANIUM COATING - High speed steel makes it last longer than others, titanium coating ensures easily cut through most sheet metal. The double design enables a faster and smoother .Open a variety of size aperture with one Drill Bit
Description:

Package Content: This stepped drill bit includes 5 pieces stepped drill and 1 piece automatic center punch. You can process 50 different kinds of diameter holes with this 5 pcs drill bit.
Titanium Coating: These step bits are made of High Speed Steel with titanium coating ensures outstanding durability and sharpness, can reduces the friction, runs cooler.. And it performs well in heat, corrosion and rust resistance.
Automatic Center Punch: The center punch can help you mark the center point of the hole you want to drill, make your operation easier.
Widely Application: Our step drill bits are designed to easily cut /drill through steel sheets, aluminum sheets, wood board, plastic board etc.(excluding steel or any other harder metal.) Suitable for home DIY, and general building/engineering use.
Aluminum Storage Case: Our all drills all come in an aluminum box for your convenience and storage. And the aluminum shell protects the drill bit not easy to dull and prolongs the life of the drill bit.
Size: 1/4-1-3/8; 3/16-7/8; 1/4-3/4; 1/8-1/2; 3/16-1/2