Professional quality set of super lock sockets which are very handy for removing stubborn worn or rusty nuts and bolts. The more pressure you put on them the more they will grip the nut or bolt. Manufactured from Chrome Vanadium these socket are for trade use and built to last. They have a highly polished top and a satin finish on the base. These also have knurled ring which greatly helps gripping them when they have greave and oil on them. They come in a moulded tray that will fit neatly into a toolbox. The tray will last for years if the back is foam filled to make it more sturdy and solid. Specification: Type : Shallow Socket Set. Features : Knurled grip. Drive : 3/8 and 1/4 inch. 3/8 inch Drive Sizes : 6 7 8 9 10 11 12 13 14 15 16 17 18 19 mm. 1/4 inch Drive Sizes : 6 7 8 9 10 11 12 13 mm. Finish : Polished and satin finish. Material : Chrome Vanadium steel. Number of pieces in set : 22. Storage : Bespoke Plastic Tray. Type of socket : Super lock.