• PREMIUM STEP BIT: Each unibit is constructed of #4241 industrial high-speed steel (HSS) with a titanium nitride coating for durability and strength to punch and drill clean holes in materials like plastic, aluminum, wood, copper, stainless steel, and other types of sheet metal.
• STEP DRILL BIT FOR METAL: It has a 135-degree split-point tip and features a 2-fluted spiral design that automatically deburrs and expands holes for a cleaner drilling process. With a split point tip that accelerates cutting speed, it prevents walking away from center line of bore, drilling holes in metal is fast, efficient, and clean.
• SPIRAL DESIGN: The stepped drill bit with two-flute spiral grooved design cuts smoother than a straight bit with less chatter, pulls chips up and out of the hole more effectively, runs cooler and handles thicker material and stainless steel better.
• TRI FLAT STEP BIT: The 3/8-inch TRI FLAT shank is ideal for regular drill chucks like 3 jaw drills, cordless drills or drill presses. TRI FLAT round shanks grip better and run more concentrically for less wobble and cleaner holes.
• INCLUDES: This step up hole drill bit has 10 different sizes engraved on the bit itself for easy readability. It can drill holes in the following sizes: 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8".
  
  

Built for professionals and serious DIYers, this premium step bit is constructed of #4241 industrial high-speed steel with a titanium nitride coating for superior durability and strength, allowing you to punch and drill clean holes in materials like plastic, aluminum, wood, copper, stainless steel, and other types of sheet metal. Engineered specifically for metal, it features a 135-degree split-point tip and a 2-fluted design that automatically deburrs and expands holes for a cleaner drilling process, while the split point accelerates cutting speed and prevents the bit from walking off the center line of the bore, making every hole fast, efficient, and clean. This step bit is available in either a straight-flute or spiral-flute design — the two-flute straight grooved design cuts smooth with minimal chatter, deburrs effectively, and pulls chips up and out of the hole, while the two-flute spiral grooved design cuts even smoother with less chatter, pulls chips out more effectively, runs cooler, and handles thicker material and stainless steel better. To match your preferred drilling setup, this bit is also offered with either a 1/4-inch quick-change hex shank or a 1/4-inch tri-flank round shank — the hex shank snaps into a quick-change chuck or impact driver without tightening a regular drill chuck for easy, convenient, and fast bit swaps, while the tri-flank shank is ideal for regular drill chucks like 3-jaw drills, cordless drills, or drill presses, gripping better and running more concentrically for less wobble and cleaner holes. Whichever configuration you choose, you get a high-performance step bit designed to deliver precision, speed, and long-lasting durability on every job.