Masonry Drill Bits Set 11Pcs, Concrete Drill Bit Set For Glass,, 1/2" By Amoolo Product Features ? 11 PIECES SATISFY ALL YOU DEMAND?Masonry Drill Bit Set includes : 1/8" (3"Length*2), 1/4" (4"Length*2), 1/4" (6"Length*2), 5/16 (6"Length*2), 3/8" (6"Length*2), and 1/2" (6"Length*1). ?DURABLE INDUSTRIAL GRADE CARBIDE TIPS?amoolo Carbide Drill Bit Set are built for longevity excellent abrasion resistance, will stay sharper and make the drilling much more easier ?Drilling faster holes in bathroom tiles, or wall mirrors. ?CUT PERFECT CIRCLES HOLES?U type slot design with fast drilling dust remove?3-flats shank allows drill bit to be held tightly and stably in power drill?Spiral shank increases cutting speed and prevents slipping,Please cooling with water and control the speed when drilling, then dry the water or apply the oil to prevent rusting after used. ?MULTIPLE APPLICATION?Masonry Tile Drill Bit Set for use with electric or cordless hammer drills, Ideal for fast and efficient drilling through TILE, BRICK, CEMENT, CONCRETE, GLASS, PLASTIC, CINDERBLOCK, WOOD etc.NOT for tempered glass drilling( (e.g. car glass)).Cannot be used on tempered glass (e.g. car glass). ? WARRANTY ?If you are not fully satisfied for any reason, please contact us via Amazon for 100% refund or replacement. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!