Neiko 10193A Titanium Step Drill Bit Set， High Speed Steel | 3-Piece Set | Total 28 Sizes[Product Information]- 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: increases cutting speed with self-centering and prevents walking
- TWO-FLUTE DESIGN: clears chips faster and allows particles to escape easily
- TRI-FLATTED SHANK: fits into power tools chuck securely and eliminates slip
- SET INCLUDES: Bit #1 (6 steps): 3/16"， 1/4"， 5/16"， 3/8"， 7/16"， 1/2"; Bit #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"; Bit #3 (9 steps): 1/4"， 5/16"， 3/8"， 7/16"， 1/2"， 9/16"， 5/8"， 11/16"， 3/4"
