5PCS Hollow Chisel Mortise Drill Tool, Square Hole Drill Bit Tools Set - 1/4" 5/16" 3/8" 7/16" 1/2"

- 🔥 Precise: Sharp edges and points make consistently clean cuts with exceptional efficiency. Prevent frustration and save your time as you complete your tasks.
- 🔥 Quick and Easy: Use this tool set on compatible drills and get the perfect result within minutes. Size: 1/4 inch (6.35 mm), 5/16 inch (8 mm), 3/8 inch (9.5 mm), 7/16 inch (11.1 mm), 1/2 inch (12.7 mm)
- 🔥 Material: Made from high speed steel, after professional heat treatment, HRC48~50, ensuring its high hardness and high concentricity.
- 🔥 Universal Usage: Compatible with almost every standard square hole drill drilling (mortise and tenon machine) to use.
- 🔥 Widely Application: Great for drilling square holes in wood with a mortising machine or a mortising attachment. Fits all mortising machines and drill press attachments. Square hole drill is mainly used for woodworking aspects.