Description
Product Overview
The EZARC 15‑piece countersink drill bit set is engineered for serious woodworkers who demand precision and durability. Each bit is crafted from industrial‑grade high‑speed steel (HSS) that has undergone a nitride treatment, providing superior toughness and wear resistance compared to standard carbon steel. The set includes seven tapered pilot bits ranging from #4 to #10, and eight countersink bits with an 82° angle for a clean, flush finish. Adjustable depth stop collars allow you to set the exact pilot hole depth, ensuring consistent results across multiple fasteners. Package dimensions are compact at 6.18 x 4.02 x 1.65 inches, weighing just 14.11 ounces, making storage and transport effortless.
Usage
Designed for a wide range of woodworking projects, this set excels in cabinetry, furniture assembly, and detailed trim work. Whether you are drilling pilot holes for screws in hardwood decks or creating smooth countersinks in soft pine, the EZARC bits deliver fast, accurate cuts. Compatible with hand drills, bench drills, and electric drills, the set adapts to any workshop setup. Ideal for professional carpenters, hobbyists, and DIY enthusiasts who need reliable performance without frequent bit changes.
Why Choose Us
EZARC stands out for its commitment to quality and innovation. The nitride‑treated HSS construction extends bit life, reducing the need for replacements and saving you money. Precision‑engineered depth stop collars guarantee uniform countersink depth, eliminating guesswork and improving screw holding strength. Each bit is rigorously tested to meet industry standards, reflected in a 4.5‑star rating from over a thousand satisfied customers. With EZARC, you receive a toolset that combines performance, reliability, and value.
Key Features
- Durable nitride‑treated high‑speed steel for extended lifespan
- 82° countersink angle ensures a smooth, flush screw head
- Adjustable depth stop collars for precise, repeatable results
- Comprehensive size range covers #4 to #10 pilot and countersink needs
- Compact packaging and lightweight design for easy storage and transport
FAQ
What materials can these bits drill?
The bits are optimized for wood, including hardwoods, softwoods, plywood, and MDF. They are not intended for metal or masonry.
How do I set the depth stop collar?
Slide the collar onto the shank, align the marked line with the desired depth, and tighten the lock nut. This ensures consistent countersink depth for each hole.
Are these bits compatible with all drill types?
Yes, the shank size fits standard 1/4‑inch hex chucks, making them suitable for hand drills, bench drills, and most electric drills.
Can I use these bits for pilot holes larger than #10?
The set includes sizes up to #10. For larger pilot holes, you may need a separate drill bit of the appropriate diameter.
What is the warranty on this set?
EZARC offers a one‑year limited warranty covering manufacturing defects, ensuring you receive a reliable product.




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