5Mm Concrete Drill Bit Set, 10Pc 3/16 Inch Masonry Drill Bit Set, Plastic. Product Details OUR ADVANTAGE COMPARED TO OTHER DRILLS?Compared with ordinary drills, JOERIC 's drills are harder and longer than ordinary triangular drills. The positioning of alloy cross-heads is also more accurate. Black electroplated drills are not prone to rust. SMOOTH HOLE: Position drill by making slight dent with the tip before drilling. Small incision resistance. Feature drilling stably, opening neat, smooth, no broken edges, no tremor phenomenon, chip easily. HIGH QUALITY?Carbide with a reinforced head that prevents bit cracking and provides a longer lif. EASY TO EVACUATE CHIPS :U type slot design with fast drilling dust remove,1/4 Hex shank allows drill bit to be held tightly and stably in power drill. PACKAGE INCLUDES 10 PCS DRILL BIT SET SIZES: 10pc x 5mm (3/16 inch) If you have any problem with our products,please free contact with us, we will try our best to help you within 24h. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.