YXGOOD 5PCS HSS Cobalt Multiple Hole 50 Sizes Step Drill Bit Set Tools

Sizes: #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") Description? 1.Set includes five standard SAE step drill bits with a two-flute design for faster, smoother cutting 2. Made of super strong HSS steel for added durability and bit life. 3. Suitable for drilling holes in plastic, aluminum, copper, stainless steel and many other types of sheet metal. 4. Drills holes in steel, copper, stainless steel, plastic, aluminum and other thin materials. Specification? Condition: New Material: High Speed Steel Applicable thickness of steel plate: 5 mm Gross Weight: 451 g Net Weight: 453 g Warranty: one year Package Includes: 5 x Step Drill Bit 1 x Aluminum Case