See: HRC Racing
HRC Racing unveiled droop screws with Delrin post for 1/10 vehicles. After years of complaints and disappointments about marks made by the droop screws on the chassis of our RC cars, HRC Racing found the solution with these special droop screws with Delrin post. The post is made in solid Delrin, and can’t be removed of the screw. This provides more precise and consistent droop setting, even when driver is changing the arm angles or the wheelbase of the car, the value stay the same because it not depends of marks made on the chassis surface anymore.