This is a replacement Kyosho Rear-Front Lower Suspension Holder. This part has been machined from 7075 aluminum and anodized in Kyosho's new Gunmetal color. Designed to decrease the cost of maintenance and simplify chassis adjustment, this suspension holder uses inserts to set and retain the hinge pin angle, so if the suspension inserts wear out you don't need to replace the whole part, just replace the inserts!