The pivoted turnbuckle manhole riser is a quick, powerful expanding device with positive gripping power.
- 1-inch diametric variance (+/- 1/2 inch adjustment on diameter from mean diameter)
- 3/4 inch and up rise available in 1/4-inch increments
- Will not break from installation forces or eneven manhole frame
- Turnbuckle linkage ensures a pressed in bearing fit when installed