4pcs Woodworking Chisel Set, Square Hole Drill Bit, Steel Hollow Woodworking Chisel, Woodworking Tool Set (1/4 - 1/2 - 5/16 - 3/8 Inch) -

Professional design ideal for drilling square holes in wood with a mortiser. Fits all machines and drill attachments. The square hole drill is mainly used in the woodworking field.
Material and Size: Made of high speed steel. Heat treatment, HRC48~50, high hardness, elongated center, high concentricity; 4 sizes 1/4" (6.35mm), 5/16" (7.94mm), 3/8" (9.5mm), 1/2" (12.7mm).
Why choose this item: Reduces the labor intensity of construction workers while accelerating the speed of work and reducing costs. Perfect for the construction, renovation and decoration sectors.
Scope of delivery: 1 piece 1/4" (6.35mm), 1 piece 5/16" (7.94mm), 1 piece 3/8" (9.5mm), 1 piece 1/2" (12.7mm), Note: The punch square needs to use a drill, hammer or other tools. (None of these items are included).

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