Special socket for removing oxygen sensor. Contents: #1: 1/2″DR. x 29mm x 90mmL (7mm slot)#2: 3/8″DR. x 7/8″ x 90mmL (20mm slot)#3: 1/2″DR. x 27mm (12pt) x 82mmL#4: 3/8″DR. x 7/8″ x 80mmL (7mm slot)#5: 3/8″DR. x 1-1/16″ x 74mmL#6: 1/2″DR. x 22mm x 50mmL (90˚)#7: 3/8″DR. x 22mm x 31mmL (90˚) Please also check our ebay store:http://stores.ebay.com/topautotoolsClick here to visit our ebay store! We Accept PayPal Only.