Square Drill Bit for Drill Chisel Holes, which is efficient for woodworking Feature:1. This square bore bit is made of high-speed steel. With heat treatment, HRC48 to 50, high hardness, long hardness and high concentration.2. Use with the head, and the tension machine will cause double effect. Drilling holes requires the use of electric drills, hammers and other tools.3. Suitable for drilling on wood, with a mill or morning coat. Suitable for all engines and press accessories. Square drill bit is mainly used for woodworking.4. Reduce the manpower of construction workers, accelerate the construction speed, and reduce the construction cost of the construction, installation, renovation and decoration industries.5. This square hole drill bit is a great tool for carpenters, and you are giving these tools as a gift to others. Specification:Item Type: Square Hole Drill BitMaterial: Bearing SteelDiameter Specification:6.35mm(1/4")8mm(2/5")9.5mm(3/8")12.7mm(1/2")Purpose: DrillingApplicable Scene: WoodworkingPackage List:4 x Square Hole Drill Bit4 x Drill Sleeve4 x Cap 1) We accept Alipay, West Union, TT. All major credit cards are accepted through the payment processor's secure escrow. 2) Payment must be made within 3 days of placing the order. 3) If you can't check out immediately after the auction ends, please wait a few minutes and try again, payments should be completed within 3 days. About Shipping 1.