This unit can cut 44" to 60" in standard configuration. By adding the Underslung arms ( https://mrmanhole.com/product/water-valve-underslung-arm/) this unit can cut from 22" to 34" By adding the Arm extenders (https://mrmanhole.com/product/arm-adapter-6-kit-gold-series-b-52/)the unit can cut a 72" diameter

Product Link: https://mrmanhole.com/product/gold-series-customer-package/

Resource: https://www.youtube.com/watch?v=yV1yJwhkG3M