This product is a special open sleeve for removing oil pipe nuts. The slotted design on the side allows for quick and easy removal of union nuts. The main body of the sleeve is made of -V chromium vanadium steel, with chrome plating on the . Type:3/8inch 1/2inch Injector Fuel Line Socket Wrench Set Note:Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Colour:Silver Material:Chrome vanadium steel Size:10mm/11mm/12mm/13mm/14mm/17mm/19mm/21mm/22mm Package Contents: 1 * Flare Nut Socket Set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.