Product Description: The tenon chisel is an ideal tool for drilling wood with a tenon or tenon. The diamond squares cannot be used on an electric drill, but must be used together with the diamond squares (spigot). Quadrangular hole, spigot + sleeve in the middle of the combination. The utility model reduces the labor intensity of construction workers, accelerates the construction speed, and reduces the construction cost of construction, installation, decoration, decoration and other industries. Product Specification:Product Size:6/6.4/8/9.5/10/11/12/12.5/12.7/14/15/16mm0.23/0.25/0.31/0.37/0.39/0.43/0.47/0.49/0.49/0.5/0.55/0.59/0.62 inch Material: Carbon Steel Hardness: hrc-50Color: Silver Package Content:1 bit Only contains the contents of the previous package and no other items. Note: The light and different screens may make the color of the items in the picture slightly different from the actual color. The permissible measurement error is +/- 1-3cm. Thank you for your attention, there are so many useful and cheap items in our store. Have a nice day!