Uxcell Square Hole Drill Bit, 3/8" High-Carbon Steel Hollow Chisel Mortise Power Product Details ?SIZE?3/8"(9.5m) square chisel width, 55mm cutting depth, 205mm total length. ?TIP AND EDGE?The best designed Drilling Point tip and 4 Cutting Corner to enable the fast drilling and penetrating into working pieces of wood very smooth and fast. ?MATERIAL?Made of High-carbon steel, through heat processing, with high hardness (48-50 HRC) drill bits, and sharp-edged square chisel, long service time. ?ADVANTAGE?With long drill core and square chisel, easy to lock the hole on the wood, can reduce labor intensity of construction workers, speed up the construction speed, reduce construction costs. ?WIDE APPLICATIONS?It can be used together with a tenon and tenon machine to achieve dual effects, and cannot be used with a manual electric drill and a common drill stand (non-square tenon machine). Suitable for construction, installation, decoration, decoration industry, etc. 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.