Function: Specially designed to remove and install the locking nut on front suspension strut when replace the units. Compact and simple design, easy to carry and use. Configuration: Including 21mm support nut sockets with 12 point design, 1/2" square drive slot,can meet many different vehicles. Easy To Use: 12 point sleeve, used to remove or install support nut, practical. Comply with standard specifications and strictly abide by factory quality control. Excellent Quality: The pillar nut sleeve is made of high-quality aluminum alloy material, durable and excellent in performance. 12 Months Warranty: we offer 12 months warranty, we will replace or refund if the tool have any quality problem. Specially designed to remove and install the locking nut on front suspension strut when replace the units. Compact and simple design, easy to carry and use.