Package Included:_x005F_x000D_1x 1/4-Inch (6mm) Woodworking Square Hole Drill_x005F_x000D_1x 1/3-Inch (8mm) Woodworking Square Hole Drill_x005F_x000D_1x 1/2-Inch (12.5mm) Woodworking Square Hole Drill_x005F_x000D_Product Specification_x005F_x000D_Model:833749_x005F_x000D_Name:Square Mortising Chisel_x005F_x000D_Material:45 Steel_x005F_x000D_Square hole size: 6mm 8mm 12.5mm_x005F_x000D_ _x005F_x000D_Application:_x005F_x000D_Mainly used for carpentry, applicable to the construction, installation, decoration, decoration industry use._x005F_x000D_ _x005F_x000D_Use:_x005F_x000D_-Use matters: Square hole drill is mainly used for woodworking aspects._x005F_x000D_-Square hole drilling is used in the square tenon hine, specially used for a drill square hole, it can not be used on elecc drill._x005F_x000D_ _x005F_x000D_Features_x005F_x000D_-This Mortising Chisel set is great for drilling square holes in wood_x005F_x000D_Reduce labor intensity of construction workers, speed up the construction speed, reduce construction costs for construction, installation, renovation, decoration induses._x005F_x000D_-Fits mortising attachments with 3/4 ""collars_x005F_x000D_Note:_x005F_x000D_ - Please allow a slight error due to manual measurements,belongs to the normal phenomenon._x005F_x000D_ - And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you