5.?Note?: This product is only the accessory shown in the picture, it needs to be used with a square hole drilling machine, and cannot be used on an electric drill! It is mainly used for drilling square slots in professional wood, but not for hard materials such as metal, glass, and gypsum board. 4.?Application?: This product can reduce labor intensity and improve work efficiency. It is suitable for building construction, woodworking DIY, decoration and decoration industries. Suggested materials: compressed board, plastic, density board, sandalwood, pine, ash, pine and other materials with low hardness. 3.?56HRC bearing steel material?: select high-quality bearing steel, sharp, strong and not easy to rust, with threaded structure, sharp and wear-resistant cutting edge, greatly avoiding dangerous situations such as bursting, and long service life. 2.?Working principle?: The product is mainly composed of an inner rotating impact body and an outer impact body. While the inner rotating body is used to drill the circular hole, the impact force transmitted to the outer impact body by the electric hammer is used to break the gap between the circular hole and the square head wall. The material can be quickly processed into square holes, and the dust can be discharged from the slag pipe. 1.?Attention?: This product is suitable for drill chucks from 3 to 16 mm, and the vertical distance between the desktop drill chuck and the workbench should be at least 300MM (11.8in).If you are not sure about the model of the drill, please provide your drill specifications first, and our technical personnel will help you determine whether the product is suitable.

Blade Material: Alloy Steel. Handle Material: Plastic, Sandalwood. Brand: YUCHENGTECH. Date First Available: May 29, 2018. Best Sellers Rank: #240,912 in Tools & Home Improvement. Customer Reviews: 4.5 4.5 out of 5 stars 15 ratings 4.5 out of 5 stars. : B09PTF7FJR. Batteries Required?: ?No. Batteries Included?: ?No. Speed: ?4500 RPM. Handle Material: ?Plastic, Sandalwood. Number Of Pieces: ?1. Power Source: ?Wind Powered. Material: ?Metal. Color: ?Black Blue, Black. Is Discontinued By Manufacturer: ?No. Item model number: ?NNW-846. Package Dimensions: ?14.57 x 13.86 x 5.08 inches. Item Weight: ?11 pounds. Part Number: ?NNW-846. Manufacturer: ?YUCHENGTECH.