🛠️ [E•ZEN] Depth Adjustable Countersink Drill Bit
Model No.: 3×7.8mm / 3×8mm / 3×9mm / 4×10mm

A patented drill bit system that enables easy, fast, and tool-free depth adjustment, designed for precise and repeatable woodworking. Suitable for beginners and professionals alike, this product prevents surface damage and supports high-efficiency drilling.

The EZEN Countersink Drill Bit features a depth-adjustable stopper bearing that allows users to control drilling depth manually, without requiring an L-wrench.

With a simple knurling adjustment, the stopper can be set to a specific depth between 1.2mm and 21mm, or removed to extend the drilling range up to 39mm.

Its excellent chip emission ensures smooth perforation, preventing drill bit damage and maintaining clean results. Ideal for working with both soft and hard wood, it’s particularly useful for decking, porch, and balcony installations.

The patented design supports replaceable components (center bit and body), offering extended durability and cost efficiency.

📌 Key Features

•  Tool-Free Depth Adjustment using knurled ring (no L-wrench needed)

•  Patented Stopper Bearing to prevent surface damage

•  Repeatable Precision Drilling with fixed depth setting

•  High Chip Emission Performance for clean, smooth holes

•  Replaceable Drill Tip and Body for long-term use

•  Stopper Adjustment Range: 1.2mm–21mm (up to 39mm without stopper)

•  Certified by Korean and U.S. Patents

📐 Specifications

•  Hexagonal Shank: 6.35mm

•  Body Length (OL): 70mm

•  Max Working Scope (XL): 39mm

•  Stopper Range (L): 1.2–21mm

•  Material: Hardened Steel, Stopper Bearing Included

•  Made in Korea

🧠 Why Choose EZEN's Patented System?

•  No additional tools required – Adjust the depth by hand with precision

•  Stopper prevents over-drilling, making it safer and easier for beginners

•  Smooth chip removal prevents clogging and prolongs drill life

•  Patented in Korea and the U.S., guaranteeing innovation and exclusivity

🎯 Recommended Use

•  Woodworking, carpentry, and cabinetry

•  Repetitive depth drilling (screw or dowel installation)

•  Decking, porch construction, and general interior/exterior works

•  DIY, hobbyist, and professional use

📜 Patents:

•  Registered in South Korea and United States (USPTO)

•  Patented technology for a depth-adjustable stopper mechanism, recognized in both Korea and the United States

🏢 Company Introduction – EZEN KOREA

EZEN KOREA is a Korean manufacturer specializing in user-friendly and high-efficiency woodworking tools. With a strong commitment to quality, precision, and ergonomic design, the company develops innovative solutions that make professional-grade results accessible to everyone — from skilled craftsmen to DIY enthusiasts.

EZEN's signature product, the Depth Adjustable Countersink Drill Bit, is a patented solution that allows fast and tool-free depth control during drilling. This unique stopper system improves accuracy, protects surfaces, and enables repeatable, clean results with ease.

Through continuous R&D and a user-first design philosophy, EZEN KOREA holds multiple domestic and international patents, including a U.S. patent, and supplies high-performance products trusted by both domestic and overseas markets.

🔧 Core Business Areas

•  Development and manufacturing of precision woodworking tools

•  Patented countersink drill bit technology

•  Custom tool engineering and OEM solutions

🌍 Vision & Mission

•  Vision: To become the global standard in efficient, intuitive woodworking tools

•  Mission: Empower both beginners and professionals to work better, safer, and smarter

🌐 Official Website: www.ezenkorea.com