Our Rolling Jacks fit the most popular 4-post lifts, replacing original equipment jacks. Model 8900 handles up to 9,000 lbs. and comes with telescoping mounting brackets. The lift arms adjust from 33″ to 50″. The narrow width allows easy access to the area of the vehicle being serviced, and the spring-loaded mounting bracket rollers allow the jack to be easily positioned and automatically locked into place when weight is applied. There’s also a mechanical 3-position lock.