5pc Bit Step SAE 1/4" & 3/8" inch Shanks High Speed Steel w/ Cobalt Coating

TITANIUM | HIGH SPEED STEEL: 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 135 SPLIT POINT TIP AND TWO-FLUTE DESIGN: increases cutting speed with self-centering and prevents walking, clears chips faster and allows particles to escape easily TRI-FLATTED SHANK: fits into power tools chuck securely and eliminates slip ORGANIZED STORAGE: set includes a sturdy aluminum organizing case for secure storage and easy carrying SET INCLUDES: Drill Bit #1 (10 step sizes): 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8; Drill Bit #2 (12 step sizes): 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8; Drill Bit #3 (9 steps): 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"; Drill Bit #4 (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"; Drill Bit #5 (6 steps): 3