Size and compatibility - Drilling diameter: 3/16", 1/4", 5/16", 3/8", 1/2" - Hex shank: 1/4" - Total length: 4", 4", 4-17/32", 4-3/4", 4-15/16" - Type: cross angle head - 1/4" hex shank installs easier and more securely into all power tools - Can be used with universal hand drills and bench drills Material - Masonry drill bits with tungsten carbide tips are harder, more durable, and more wear-resistant than ordinary drill bits - Small incision resistance, accurate and easy drilling - Black chrome plating enhances corrosion resistance, extends service life and prevents rust Feature - Cross angle tip helps provide an efficient cutting action in masonry materials like concrete, brick and stone - The cross angle tip enhances drilling speed and performance by reducing resistance and minimizing bit walking - U groove design for quick drilling and dust removal Applications - The drill bits are designed for drilling holes in concrete, masonry, bricks, glass, ceramic tiles, marble, stone, tile walls, glass mirrors, plastic and wood - Not suitable for metals - Make sure there are no steel bars or other metal objects before drilling Use scenarios - Drilling anchor holes in a concrete wall to install shelves or fixings - Drilling through ceramic or glass tiles for electrical outlets or mounting brackets - Drilling holes in marble or stone countertops or vanity tops for hardware installation