7Pcs Efficient Drilling Tool Multifunctional Cross Alloy Drill Bits

Features: * brand new and high quality. *It is made of high quality YG6X alloy as raw material. The process of oxynitriding of the cutter head strengthen the drill hardness. *Full-grinding and anti-rust treatment clean and without burrs .The drill bit is more wear-resistant and more . *Small incision resistance，feature drilling stably fast speed not breaking the border. Opening neat smooth no broken edges no tremor phenomenon chip easily. *Professional glass and tile drill bits provide smooth and accurate drilling in ceramic tiles marble thin iron plate mirrors and glass. Remember to add Water or coolant when drilling. *7 different sizes suitable for your different needs.It Can be installed in the general electric hand drill bench drill. Specifications: *Material: Cemented Carbide *Color: As picture show *Shank: 1/4Inch (6.35mm) Hex *Size: 3mm 4mm 5mm 6mm 8mm 10mm 12mm *Quantity: 7pcs Package Contents: 7* Drilling Tool Notes: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.