: Made of solid Metal material . Durable and sturdy , safe and eco - friendly to use . These sockets are for use with air , electric or manual impact wrenches . Suitable For Drive Size : 3 / 4 & quot ;. Specification : Material : Metal Size : Approx 55mm * 20mm Package Includes : 1 Piece 12 Point Deep Impact Socket Note : Please allow 0 . 5 - 1 inch difference due to manual measurement .( 1 inch = 2 . 54cm ) Please check the size measurement and the picture carefully before making payment . Due to the difference between different monitors , the picture may not reflect the actual color of the item . Please understand , Thank you .