Set of 4 Chisels, Square Hole Drill Bits, Hollow Steel Chisels, Woodworking Tools 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. Square hole drill bit is mainly used in woodworking field.Material and size: made of high speed steel. Heat treatment, high hardness, elongated center, high concentricity; 4 sizes 1/4" (6.4mm), 5/16" (8mm), 3/8" (9.5mm), 1/2" (12.7mm). Why choose this item: Reduces the labor intensity of workers construction while accelerating the speed of work and reducing costs. Perfect for the building, renovation and decoration sectors.Scope of delivery: 1 piece 1/4" (6.4mm), 1 piece 5/16" (8mm), 1 piece 3/8" (9.5mm), 1 piece 1/2" (12.7mm), Note: The square drive requires a drill, hammer, or other tools. (None of these items are included).Note: All data is measured manually; please allow for a 1-3cm error. Due to differences in lighting and display, there may be some color variation; the actual product received shall prevail.