Whether you have a small amount of fence replace, or you have a large amount of fence to build. These drivers are ideal for terrain requiring little alignment adjustment. The HPD-16 / HPD-20 feature heavy-duty adjusting base built to withstand shock loads drivers produce during operation. Both drivers use two manual adjustable, deep-threaded, plated cranks. One crank adjusts the fore and aft positions. Another crank adjusts the side to side positions. Grease zerks are located on all pivoting members.