The Keystone Driver with Nitrogen Hydraulic Impact Head is designed to handle every day commercial contractor use. Specialized controls for constant down pressure on the impact driver allows you to drive up to 7.75” x 12’ posts with ease! A conveniently located high flow guided down pressure auger (auger sold separately) allows post driving where drilling is required. This unit tilts side to side to accommodate uneven terrain and has a built in chain to pull posts when required. Built in the USA!