Luckyway 1-Piece 15 Steps HSS-CO(M35) 1/4 Inch to 1-3/8 Inch Titanium Step Drill Bit for Metal, Stainless Steel Drilling

*DIMENSIONS - 15 STEP SIZES: 1/4",5/16",3/8",7/16",1/2",9/16",5/8",3/4",7/8",15/16",1",1-1/8",1-3/16",1-1/4",1-3/8".

*APPLICATION - Capability and durability in drilling holes in plastic, aluminum, copper, stainless steel,HRC40 steel plate and many other types of sheet metal.★If used in 4mm stainless steel plate, can make more than 500 holes. ★It can be used to bore holes in steel plates up to HRC40.

*MATERIAL - HSS-CO(M35)for longer life, higher efficiency,very easy drilling.

*FEATURES - 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.