Neiko 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”).