Square Hole Drilling Hole Opener, 14mm Mortise Drill Bit, Multi-function High Speed Steel Square Hole Drill Bit for DIY Woodworking Production

[Hole Saw] Designed to be mounted on a mortise chisel used to drill holes in wood. The length of the drill bit is 17.5cm / 6.88in, which can effectively reduce labor intensity and labor cost. * The woodworking square hole drill cannot be used on an electric drill, the square hole must be suitable for a square hole drill (tenon machine).【High Performance】 The drill bit is sharp, it can easily drill new holes, quickly remove cutting materials, no chips or chip breakage, saving time and effort. At the same time, the chip flute design of the square hole drill can quickly remove wood chips and improve drilling efficiency.【Exquisite Workmanship】 Efficient square hole design, uniform force, smooth punching without burrs, low noise processing and not easy to break. The superb sharpening technology makes the blade sharper and more durable. It is a must-have for home woodworkers. [High-quality material] The ferrule drill bit is made of high-quality high-speed steel, with high hardness, wear resistance, high temperature resistance, longer service life, long-term recycling, and accurate positioning. 【Wide applications】Perfect for all kinds of woodworking, carpentry and crafts, construction, and maintenance work. *Reminder: The drill seat insert is on a flat surface, which can effectively ensure the strength of the drill seat and prevent the drill seat from bursting when used for the first time.