Tifco DuraMaxx Coated Step Drill — 1/4″ to 1 3/8″ by 1/16″
Stop swapping bits mid-job. The DuraMaxx Coated Step Drill (Part 51421) covers 19 hole sizes in a single tool — from 1/4″ up to 1 3/8″ in precise 1/16″ increments — so you stay on the work, not hunting through your bag.
Built for the Field
- Wide size range: 1/4″ to 1 3/8″ in 1/16″ steps — one bit handles what a full set used to
- Durable coating: Wear-resistant finish extends tool life and reduces heat buildup during extended use
- Clean, burr-free holes: Engineered geometry minimizes burring in metal, plastic, and composite materials
- Reduced setup time: Eliminates bit changes between sizes on multi-hole layouts
Ideal Applications
- Electrical installation and conduit work
- HVAC panel and enclosure fabrication
- General metal fabrication and sheet work
- Plastic and composite panel drilling
SKU: 51421 | Vendor: Tifco | Type: Step Drill Bit
