Milwaukee 48-89-9291 Cobalt Step Bit Kit, 3-Piece
- The Milwaukee 48-89-9291 Cobalt Step Bit Kit 3-Piece is a compact set of step drill bits designed for stainless steel and mild steel sheet metal work. The kit includes three sizes of step bits with sharp Rapid Strike tip for faster starts, dual-flute design for heat management, and secure-grip shanks to reduce slippage.
- Features:
- Engineered to deliver up to 15x the life in stainless steel compared to previous options ideal for repeated drilling tasks.
- Capable of producing over 1000 holes in mild steel before significant wear, making them durable for heavy use.
- Elongated dual-flute design improves cooling and chip evacuation, reducing heat buildup during drilling.
- Rapid Strike tip allows faster, more accurate starts especially in tougher materials like stainless steel.
- Includes:
- #1 step drill bit (1/8 inch to 1/2 inch) (48-89-9281)
- #4 step drill bit (3/16 inch to 7/8 inch) (48-89-9284)
- #9 step drill bit (7/8 inch to 1-1/8 inch) (48-89-9289)
- Specifications:
- Manufacturer: Milwaukee
- Part Number: 48-89-9291
- Bit Material: Cobalt / Bi-Metal
- Bit Sizes: #1 (1/8 inch to 1/2 inch), #4 (3/16 inch to 7/8 inch), #9 (7/8 inch to 1-1/8 inch)
- Recommended Material Thickness: up to 14 ga sheet in stainless steel; higher gauge possible in mild steel.
- Shank Style: 3-Flat Secure-Grip shank to reduce bit slippage in the chuck.
- Laser-engraved size reference marks on each step for quick sizing.
- Case: includes storage case for the three bits.
- System Compatibility: Designed for use in cordless drills and standard drills; great for metalwork, HVAC, stainless, electrical panels, and sheet-metal jobs.
- The Milwaukee 48-89-9291 can also be referred to as Milwaukee Cobalt Step Drill Bit Set 48-89-9291, #1 #4 #9 Step Bit Kit, 3 Pc Stainless Step Bits, Cobalt Step Bit Kit USA, Milwaukee Step Bit Combo 3-pc.
Milwaukee is a major manufacturer of professional outdoor power equipment. It is known for durable trade-grade fastening equipment.
Q: What does "step bit" mean, and when would I choose this over regular twist bits?
A: A "step bit" has incremental steps carved into the bit, allowing one bit to drill multiple size holes; this set lets you cover several common hole sizes without switching bits useful for sheet metal, electrical panel holes, or when speed and variety matter.
Q: Can these bits be used in stainless steel and how durable are they?
A: Yes, they are cobalt / bi-metal bits engineered to deliver up to 15x the life in stainless steel compared to previous solutions and produce over 1000 holes in mild steel under typical conditions.
Q: What size holes can I make with each bit in this kit?
A: #1 bit drills from 1/8 inch to 1/2 inch; #4 drills from 3/16 inch to 7/8 inch; #9 drills from 7/8 inch to 1-1/8 inch.
