Step Drill Bit #4, 3/16 in. - 7/8 in. x 1/16 in.

Milwaukee® JAM-FREE performance step drill bits feature a dual-flute design delivering up to 2X faster drilling, up to 4X longer life and up to 50% more holes per battery charge than competitors. Ideal for drilling large and small diameter holes in steel and plastic, these bits are optimized for cordless high-speed drills. The Rapid Strike™ tip enables fast and accurate starts that generate less heat, which prolongs the life of the bit tip. The black oxide coating also improves durability, hole quality and bit life. For user convenience and accuracy, each bit features laser engraved markings that you can see while drilling. The 3-flat Secure-Grip™ shank ensures a solid connection with the drill chuck. The #4 step drill bit has 12 hole sizes in 1/16 in. increments ranging from 3/16 in. to 7/8 in. JAM-FREE performance at high speed with most 18-volt cordless professional drills featuring lithium-ion battery technology.

• JAM-FREE Performance: Dual-flute design provides increased speed and control.
• Up to 2X Faster: Optimized for cordless high-speed drills
• Rapid Strike™ Tip: Creates fast, accurate starts and generates less heat.
• Up to 4X Longer Bit Life: Optimized geometry with black oxide coating to cut faster and produce less heat.
• Up to 50% More Holes Per Battery Charge for increased productivity.
• Laser-engraved reference marks easily stop on any hole size.
• Secure-Grip 3-Flat Shanks Reduce bit slipping in the chuck
• Made in the USA

• Height 149.9 mm 
• Width 26.7 mm 
• Length 26.7 mm 
• Weight 97.5 g 

• Product Type Step Drill Bit
• Drill Bit Type Step
• Bit Type Step
• Single / Double Ended Single
• Recommended Safety Equipment Safety Glasses
• Point Rapid Strike Tip
• Impact Rated No
• Set / Individual Individual
• Cutter Geometry Dual Straight Flute
• Bit Diameter 7/8 po
• Shank Style 3-Flat
• Shank Diameter 3/8 po
• Drill Bit Size 3/16 po, 1/4 po, 5/16 po, 3/8 po, 7/16 po, 1/2 po, 9/16 po, 5/8 po, 11/16 po, 3/4 po, 13/16 po, 7/8 po
• Size Range 3/16 po to 7/8 po
• Style 3 Flats Shank
• Bit Length 2.96
• Overall Bit Length 2.955
• Drilling Depth (in) 2.125
• Number of Flutes 2
• Number of Holes 12
• Steps 12
• Step Thickness 1/8 po
• Flute Length (in) 0.5
• Shank Diameter Inches 0.375