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Feature

Size:3/16" to 1/2"(3/16'', 1/4'', 5/16", 3/8'', 7/16'', 1/2''),1/8" to 1/2"(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''),1/4" to 3/4''(1/4'', 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"),1/4" to 1-3/8''(1/4'', 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8"),3/16" to 7/8"(1/4'', 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8")
Classic high speed steel with titanium coating for proven capability and durability in drilling holes in plastic, aluminum, copper, stainless steel and many other types of sheet metal
Cobalt coated to reduce friction and run cooler,increases cutting speed with self-centering and prevents walking, clears chips faster and allows particles to escape easily.
Large bit has 3-sided shank and small bits have hex shank to prevent slip in drill chuck
Set includes a sturdy aluminum organizing case for secure storage and easy carrying

Description

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")

Caution: When you use this drill bits, the material temperature will get very high, please add some water or coolant to avoid the material get smoke when using it.

Package including:
1 x 1/4-1-3/8 Step Drill
1 x 3/16-7/8 Step Drill
1 x 1/4-3/4 Step Drill
1 x 1/8-1/2 Step Drill
1 x 3/16-1/2 Step Drill
1 x Aluminum Box