Check the listing for details. 5 PIECE 8mm Adjustable Counterbore Countersink Drills Bits- DEPTH STOP Drill Bit. Condition: New. Listed at 18.99 USD. 8mm Adjustable Countersink Drill Bits Brand new Set of 5 pieces- different drill sizes shown in pictureAdjustable stop to control the depth of the hole Drill length is adjustable as well with a set screw 8mm shank (5/16") Carbide tip on Countersink: YG6X High Speed Steel drillsSteel Body Combined Shipping DiscountI always combine shipping. For all orders over 35$ (minus tax and shipping) shipping is free. For orders under 35$, shipping is charged for one item only. The price of shipping does not increase with multiple items. To obtain these discounts all items must be added to the ebay cart and checked out as one order. Shipping is Fast Items are always shipped in the USA within one business day of purchase. Packages under 1 lb are shipped USPS first class. All items over 1 lb are shipped Priority mail. Warnings Follow any and all manufacture's safety guidelines before using this tool. Always use eye and ear protection along a proper respirator and ventilation. Do not exceed maximum recommended RPM settings. Always visually inspect tools and never use anything that is suspected to be damaged.