Step Drill Bit Set with Automatic Center Punch- Titanium Coated, Double Cutting Blades, High Speed Steel, Short Length Drill Bits Set of 5 pcs, Total 50 Sizes with Aluminum Case, Multiple Hole Step

Feature: Our materials are what set us apart from the rest. Our high quality heat resistant steel blades allow for reliable cuts over and over again. Drills holes of various sizes without changing bits. Automatic Center Punch: Gift - mark workpiece with a dimple to prevent screws and drills from wandering. Note: Pre-drilling a hole in the center of the spot weld byusing a center punch to create a starting point provides extra guidance/stability when beginning the cut. Exquisite Aluminum Case protects the drill bits not easy to dull ,and everything is packaged into a case for easy transport and storage . UNIVERSAL COMPATIBILITY, the step drill bits help you to drill holes with different diameter simultaneously, compatible with aluminum, copper, steel sheets and plastic and wood board that is less than 3mm/0.12 in. in thickness. Specification Type: Step Drill Bit Material: High Speed Steel Package Includes 5 x Step Drill Bit Set 1 x Automatic Center Punch 1 x Aluminum Case Size Includes: #1: 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") #2: 3/16" to 7/8" 12 Steps (3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8") #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: 1/8" 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") #5: 3/16" to 1/2" 6 Steps (3/16", 1/4", 5/16", 3/8", 7/16", 1/2")