Our “Pivoted Turnbuckle” is the most Efficient, Powerful Expandable Manhole Riser on the Market. American Highway Products Ltd. Manhole riser is used to reduce cost and stream line the adjusting of utilities to the new grade when paving a road. Its unique pivoted turnbuckle linkage ensures a pressed in bearing fit when installed. This pressed in bearing fit enables installation before paving the road. The Pivoted Linkage will contract and expand the Manhole Riser ?”, giving a full 1” diametric variance, thus allowing the flexibility to work on different diameter frames. The risers start at ?” rise and go up in ?” increments. This method saves time and money to adjust the utilities to grade. A typical fame adjustment costs $300.00 to $450.00 each depending on location and number of adjustments done. Utilizing a Pivoted Turnbuckle Manhole Riser from American Highway Products Ltd. will save over 75% of that cost of adjusting utilities.