Features: Experience unparalleled drilling precisions with our 4/5 piece 150mm extended eccentric drill bit set, featuring hard carbide metal for superior hardness and wear resistance, perfect for penetrating high density materials like concrete and glass. Designed with a innovative off center head and twist grooves, this drill bit ensures precise positioning and reduces the risk of chipping on smooth surfaces, making it ideal for delicate tasks. Suitable for both DIY enthusiasts and professional contractors, this drill bit set offers versatility and reliability for various skill levels and project demands. Perfect for home renovations or construction site, its dry drilling capability eliminates the need for water cooling, enabling efficient work in environments without water sources. The hex shank ensures compatibility with most electric drills, making it a practical addition to any toolkit. Specifications: Component: Cemented Carbide Color: As pictures shown. Optional Quantity: 4pcs/set: 6+8+10+12mm, 5pcs/set 6+6+8+10+12mm Diameter: 6mm/8mm/10mm/12mm Total Length: 15cm/5.91in Package Includes: 4pcs or 5pcs Eccentric Drill Bits (optional) note: Please allow 0-2cm error due to manual measurement. Please make sure you do not mind before you bid. The color may Please allow 0-2cm error due to manual measurement. Please make sure you do not mind before you bid.