7Pcs Ultimate Drill bits?Carbide Drill bit Set Masonry bit bit with Tungsten Carbide Drill bit Drilling and Punching Work kit for Ceramic Tile Concrete Brick Glass Plastic and Wood

1.Premium material:Carbide and durable alloy with reinforced head prevent bit cracking and provide longer life. 2.Triangular shank allows drill bits to be held tightly and prevents slip. Multifunctional ceramic tile drill, ceramic glass hole opener, iron opening reamer. 3. U type slot design an increased opening speed, easy chip removal. Please keep vertical angle and steadily when drilling hard metal to avoid broken. 4.Universal handle for electric drills and bench drills, but NOT fit for impact drills. Keep the product out of the reach of children to avoid accidental injury. 5.In order to prolong the service life of the drill bit, it is better to cool the tip with water, When using. SPECIFICATION: 1. Material: hard alloy. 2. Tool holder type: triangular handle. 3. Cooling type: external cold. 4. Top angle of outer blade: 45°. Package included: 3mm Drills x 1pcs 4mm Drills x 1pcs 5mm Drills x 1pcs 6mm Drills x 1pcs 8mm Drills x 1pcs 10mm Drills x 1pcs 12mm Drills x 1pcs