NEIKO 10197A Step Drill Bit Set, 5 Pc Step Bit for Metal, 50 SAE Sizes Total, 1/8” – 1-3/8”, SAE Titanium High Speed Steel Unibit, Stepper Cone Drill Bit, Two Flute Step Down Bits, Step Up Drill Bits

• HSS STEP BIT: Classic step drill bit set constructed of high-speed steel for drilling holes in plastic, aluminum, copper, stainless steel, and many other types of sheet metal. Also doubles as a hole expander.
• TWO FLUTE & TRI SHANK: Two-flute design deburrs during drilling, clearing chips faster and allowing particles to escape for clean cut holes. Each step drill bit features a tri-flatted shank for a secure fit into power tool chucks, eliminating slip.
• MULTIPLE HOLE DRILL BIT: This versatile unibit step drill bit cone bit can replace 50 individual drill bits for metal with just 5 pieces in one box. Drill a range of different sizes and holes with a single bit without needing to change between bits.
• STEP DRILL BIT SET INCLUDES: Four multipurpose metal dill bit in 1/4-inch shank and 3/8-inch shank and a red blow mold carrying case for easy convenience and storage in your car, garage or shop.
• 50 SIZES IN 1: 5 stepper bits included. 1 x 6 step bit (1/4” shank; 3/16” - 1/2”), 1 x 13 step bit (1/4” shank; 1/8” – 1/2"), 1 x 9 step bit (3/8” shank; 1/4" to 3/4"), 1 x 10 step bit (3/8” shank; 1/4” – 1-3/8”), and 1 x 12 step bit (3/8” shank; 3/16” – 7/8”).

The NEIKO 10197A Step Up Drill Bit set is your all in one drill bit set, drill a range of different sizes with a single bit. Looking to expand holes or drill into metal, this drillbit in the shape of a cone has multiple sizes in one. Conical shaped bit that allows you to drill a variety of hole sizes without needing to change between bits. The tip of the drill bit drills the smallest hole and as you step or drill further down the diameter increases as you drill. 1/4" Shank: 3/16" to 1/2", 6 steps (3/16, 1/4, 5/16, 3/8, 7/16, 1/2") 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") 3/8" Shank: 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") 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") 3/16" to 7/8", 12 steps (3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8")