【Premium Carbide Drill Bit Set】10 pcs with tip diameters: 5/32"(*2), 3/16"(*2), 1/4"(*3), 5/16", 3/8" and 1/2". 【High Quality Material】Features a YG6X alloy head that reduces resistance, improves precision, and provides high wear resistance. Double helical groove for quick chip removal. 【Features】Anti-vibration structure paired with a sharp centering tip ensures precise drilling, ideal for delicate materials like tile and glass. 【Wide Application】Ideal for glass, cement, brick, tile, wood, plastic, marble and and thin stainless steel (