🔩 [What’s Included]
This package contains one square hole drill bit adapter and four square hole drill bits in the following sizes: 1/4 inch (6.4 mm), 5/16 inch (8 mm), 3/8 inch (9.5 mm), and 1/2 inch (12.7 mm). It is compatible with hand drill jigs ranging from 1.5 to 2.2 inches (38 to 55 mm) in diameter. Please note: This set is designed for bench drills and hand drills with clamps only.

🔩 [Premium Carbide Material]
Made from high-quality carbide, the square hole drill bit adapter is strong, durable, and provides a firm grip on wood. With a total length of approximately 6.3 inches (16 cm), an upper inner diameter of 0.75 inches (1.9 cm), and a lower diameter of 2.17 inches (5.5 cm), it minimizes usage errors. The drill bits feature high hardness, fast cutting speed, and a clog-resistant design, ensuring smooth operation. Caution: The drill bits are sharp—handle with care.

🔩 [Compatible with Bench & Hand Drills]
Designed with a double support bracket, this set is reliable and practical, making it perfect for bench drills and hand drills. Ideal for woodworking, furniture making, and related industries.

🔩 [Effortless Operation]
The square hole drill bit adapter and drill bit set are easy to use, allowing for precise and efficient mortise and tenon drilling. This setup offers a faster and more convenient alternative to traditional mortise and tenon machines.

🔩 [Versatile Applications]
With the square hole drill bit adapter and four drill bits, you can easily drill square holes in wooden boards, simplifying your work. Suitable for use in construction, woodworking DIY projects, and the decoration industry, it works on materials such as compression board, plastic, MDF, sandalwood, pine, ash, and other low-hardness woods.