1). Pile Driving Functions: HW Model Wheeled Pile Driver is designed to install and maintain highway anti-collision guard rails and solar posts,and is especially applicable for driving guardrail posts at newly constructed highways.It is also used for the installation of photovoltaics(PV),solar cells and panels. 2). Pile Extracting Functions: With the same hydraulic system for extracting poorly driven or incorrectly positioned posts in road maintenance work,it is a professional machine for the extracting of posts from any surface condition. 3). Pile Drilling Functions: This equipment can drill holes into concrete, rock,granite and other very hard road materials,and then easily install the posts.