Irwin 50520 5/16" Carbide Tile and Glass Drill Bit - Straight Shank (8-PACK) Drill through hard, brittle materials with confidence using the Irwin Tools 50520 5/16-inch carbide tile and glass drill bit set, a 5-piece collection engineered for precision drilling in ceramic, glass, and glazed tile. Featuring a durable carbide spear-point tip, each bit delivers clean, round holes with minimal chipping or cracking?critical for tile installations, backsplashes, shower surrounds, and glass fixtures. The aggressive spear-shaped tip grips the surface on contact, preventing wandering and ensuring accurate hole placement. Constructed from high-grade carbide, these bits resist wear and maintain cutting performance even after repeated use on dense materials. The straight shank design ensures secure fitment in standard chucks of handheld drills and rotary tools, while the brushed finish provides a clean, professional appearance. Designed for hand-powered operation, these bits are ideal for use with variable-speed drills operated at low RPM with steady pressure and water cooling to prevent overheating and extend bit life. Each bit measures 9 inches in length with a 5/16-inch (7.94 mm) diameter, making it suitable for larger fasteners, anchor installations, or decorative cutouts. The straight flute design efficiently removes debris during drilling, improving cutting speed and reducing binding. Recommended for use on ceramic, glass, and porcelain surfaces, these bits are a must-have for contractors, tile setters, and DIYers tackling bathroom, kitchen, or craft projects. Packaged in a durable 9 x 2 x 0.6-inch container, the 5-pack offers excellent value and long-term usability. Whether mounting towel bars, installing drains, or creating custom glass art, this Irwin set delivers reliable, professional-grade performance. Features - Spear-point tip design prevents slipping and minimizes chipping - Carbide construction for long-lasting durability on hard surfaces - Ideal for drilling holes in glazed tile, porcelain, mirrors, and glass - Straight shank fits securely in standard drill chucks - Straight flute design clears debris for smoother drilling - Requires low RPM, steady pressure, and water cooling for optimal results - Prevents cracking and ensures clean, precise hole entry and exit - Suitable for use with handheld drills and rotary tools - Brushed finish with durable, corrosion-resistant build - Packaged for retail and storage convenience - Made for both professional and DIY tile and glass applications - Color-coded for easy identification (multi-color packaging) Specifications - Brand Name: Irwin Tools - Model Name: Irwin Tools 50520 - Part Number: 50520 - UPC: 042526505201 - Global Trade Identification Number: 00042526505201 - Product Type: Drill Bit - Material: Carbide - Size: 5/16 in - Diameter: 5/16 in (7.94 mm) - Shank Type: Straight - Point Style: Spear Point - Tool Flute Type: Straight - Finish: Brushed - Surface Recommendation: Ceramic, Glass - Power Source: Hand Powered - Number of Pieces: 8 - Unit Count: 1.0 Count - Item Weight: 0.48 oz (per bit) - Product Dimensions: 9 x 2 x 0.6 in (packaged) - Included Components: 5x Drill Bit 5/16" Tile/Glass Carbide - Manufacturer: Irwin Tools - Country of Origin: China Product Application The Irwin Tools 50520 carbide drill bit set is designed for professionals and homeowners who need to drill precise, clean holes in hard, non-metallic surfaces. Perfect for installing fixtures in tile showers, mounting hardware on glass partitions, or creating custom cutouts in backsplashes, these bits provide superior control and finish. When used with proper technique?low speed, constant pressure, and water cooling?they deliver consistent results and extended bit life. A trusted choice for tile installers, plumbers, and craftspeople, this 5-pack ensures you?re always ready for the next job.