• Special design socket directly built in check valve, and 3pcs of double ended socket wrenches.

• Built-in wrench & socket into one convenient and compact tool for faster and easier bleeding.

• Ideal for bleeding brake system and hydraulic clutch system.

• Size : 3/8"(black)x 8mm(blue), 9mm(purple)x 10mm(golden), 11mm(red)x 12mm(orange).