Driak 5Pcs Cobalt HSS Step Drill Bit Titanium Cone Drill Hole Cutter Bit Set Tool with Aluminum Case

Specifications: Material:High Speed Steels Item Type:Step Drill Features All the bits come in a well-organized case for easy transport and storage. Double cutting blades design enables a faster and smoother cutting. Includes a protective aluminum case to make the drills not easy to dull. Cobalt added reduces friction and lasts longer than those which does not contain cobalt bits.Cobalt high speed steel along with the titanium coating ensures extreme durability, will stay new and shiny for years to come.High speed steel for longer service life. Automatically deburrs holes while drilling 3-sided shank prevents slip in drill chuck Size: #1: 3/16" to 1/2" 6 Steps (3/16'', 1/4'', 5/16", 3/8'', 7/16'', 1/2'') #2: 1/8" to 1/2" 13 Steps (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'') #3: 1/4" to 3/4'' 9 Steps (1/4'', 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4") #4: 1/4" to 1-3/8" 10 Steps (1/4'', 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8") #5: 3/16" to 7/8" 12 Steps (1/4'', 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8")" Package 5x Step Drill Bit Set 1x Aluminum Case