Fast and easy to use. Removes nuts, bolts and screws from 1/8" to 1/4", 3.5mm to 6mm and #4 to #10; and studs from 3/8" to 3/4" and 10mm to 19mm. Removes oil pan plugs, pipe nipples, corroded marine nuts and bolts, and exhaust manifold nuts. Made in the U.S.A.. Lifetime warranty13 piece set is made in the U.S.A., featuring quality workmanship and value. Removes wheel locks and lug nuts. Simply place the TurboSocket on the damaged fastener and turn. To remove the fastener from the TurboSocket, just tap socket or use a punch to knock out fastener. SK TurboSockets remove slotted and Phillips head screws too tight for a screwdriver. Even screws, nuts and bolts, with very thin, rounded or tapered heads can be removed. Includes sizes: 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm and 17mm.