QISF 4Pcs Woodworking Square Hole Drill Bits,Mortise Chisel Hole Saw Drill Bit Set 1/4-1/2-5/16-3/8 inch

• 【DESIGNED】 Professional 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.
• 【MATERIAL & SIZE】 Made of high-speed steel. Heat treatment, HRC48~50, high hardness, lengthened core, high concentricity; 4 Different size include 1/4" (6.35mm), 5/16" (7.94mm), 3/8" (9.5mm), 1/2" (12.7mm)
• 【WHY CHOOSE THIS ITEM】Reduce labor intensity of construction workers, speed up the construction speed, reduce construction costs for construction, installation, renovation, decoration industries.
• 【PACKAGE CONTENT】 1Pcs 1/4" (6.35mm); 1Pcs 5/16" (7.94mm); 1Pcs 3/8" (9.5mm); 1Pcs 1/2" (12.7mm)
• 【NOTE】The square hole punching needs to use electric drill, hammer & other tools.(All of these are not include)

Features: 1. Professional wood drill bit, suitable for construction, installation, renovation, decoration, etc. 2. The workpiece forms a hole drilled by the rotating body, while the impact of the use of the percussion force is transmitted to the outside of the body, the material creates a round hole and a square head, in one go, and the dust can be discharged through the tube. 3. The dimension refers to the length of the drilled square hole. 4. The cylinder diameter of the clamping portion is 19 mm. 5. The center of the drill hole is over 210mm, for longer drill centers. Specifications: Sizes: 1/4" (6.35mm), 5/16" (7.94mm), 3/8" (9.5mm), 1/2" (12.7mm). Material: High Speed Steel DIY Supplies: Woodworking Use: Drilling/perforating wood. Package includes: 1 x 1/4" or 1/4" drill bit 1 x 5/16" or 7.95mm drill bit 1 x 3/8" or 9.5mm drill bit 1 x 1/2" or 1/2" drill bit Note: Please allow 1-3cm error due to manual measurement. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Thank you for your understanding. Sold by QISF (Quality Innovation Service First)