P4 Trucks include the lowest inverted kingping for plenty of clearance.  Our new design uses a button head kingpin that threads into a hex nut with slot in baseplate.  We created new bushings for even better performance in 80A Durometer. 
 
Handboard Trucks includes bushings, pivot cups, 8 screws, kingpins, nuts and tool.
 
*Does not include Wheels, for photo only