Features
- Resharpenable cutting edge for extended service life
- Self-starting point for immediate engagement
- Balanced double-flute design to reduce chatter and vibration
- Three-flat shank to reduce slippage in the chuck
- Step design provides multiple hole sizes without changing bits (increments of 1/32 in)
Specifications
| Part Number | SDH1 |
| Material | High-speed steel (HSS) |
| Diameter Range (From) | 1/8 in |
| Diameter Range (To) | 1/2 in |
| Diameter Increment | 1/32 in |
| Step Depth | 1/8 in |
| Shank Diameter | 1/4 in |
| Shank Type | Three-flat |
| Flute | Double flute (balanced) |
| Pack Quantity | 1 |
| Maximum Recommended Material Thickness | Up to 1/8 in |
| Suitable Materials | Sheet metal, ducts, steel, copper, brass, aluminum, plastic, plexiglass, wood, veneers, vinyl siding, plasterboard, PVC, stainless steel, cast iron |
| Weight | 0.09 lb |
| Upc | 000346333824 |
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Step drill bit designed to produce a range of hole sizes without changing bits. Made from high-speed steel with a resharpenable cutting edge and a self-starting point. Balanced double flutes reduce chatter and vibration; a three-flat shank helps resist slippage. Intended for drilling clean, accurate holes in thin materials (up to about 1/8 in).
Model Number: SDH1
Project Ideas
Business
Mobile Van/Fleet Upfitting
Offer on-site drilling and grommet installation for cable pass‑throughs, lights, and accessories in vans and service vehicles. The step bit allows precise sizing in thin sheet metal and plastics with minimal burrs. Charge per hole and per fitting, bundle with wire management.
Custom Enclosure Drilling Service
Provide hole patterning for electronics builders (pedal enclosures, control boxes, junction panels). Accept CAD or template files, drill to exact diameters from 1/8–1/2 in, and finish with deburring. Sell standard layouts and fast-turn custom jobs.
HVAC Duct Add‑On Installs
Partner with HVAC/low-voltage contractors to create clean holes in thin ductwork and plenums for sensors, humidifiers, and takeoffs. Use the step bit to avoid oil-canning and jagged edges; include sealing with grommets or foil tape. Price per install plus materials.
Punched Lanterns & Kit Shop
Produce upcycled tin can or thin-sheet lanterns with patterned holes and sell finished pieces and DIY kits. The step bit speeds clean holes and decorative chamfers. Monetize with workshops, seasonal designs, and wholesale bundles for boutiques.
On-the-Spot Tag Hole Sizing
Set up a pop-up booth to add or resize holes in metal tags, key fobs, and light signage. The step bit lets you quickly fit split rings, rivets, and grommets without changing bits. Offer engraving as an upsell for personalized gifts and pet tags.
Creative
Marquee Light Sign
Cut letters from thin aluminum or galvanized sheet and use the step bit to drill perfectly sized holes for E12/E26 string lights. Step up the size until bulbs fit snugly, and use the next step to lightly chamfer for a finished look. Great for wall art or wedding decor.
Acrylic Pegboard Organizer
Make a clear pegboard from 1/8 in acrylic with a clean grid of holes. The self-starting point reduces wandering and the double flutes help prevent cracking. Add a slight chamfer with the next step for smooth peg insertion.
Copper Wind Chimes
Drill precise holes in thin copper sheet and small tubing for stringing chimes and attaching eyelets. The step bit lets you size holes for different cord diameters and grommets, while deburring as you go for tangle-free lines.
PVC Self-Watering Planters
Build planters from thin-wall PVC or vinyl with stepped drainage and fill holes tailored to grommets, bulkhead fittings, and drippers. The bit’s progressive steps make leak-free, precisely sized openings without cracking.
Custom Switch Panel
Fabricate an aluminum or ABS dashboard panel for toggles, rocker switches, LEDs, and 12V sockets. Use the step bit to sneak up on each hole size for a press-fit look, and add a light countersink for bezel seating.