These mySIZE Adjustable Height Hand Crank Bases by Gibraltar are available with or without locking casters. The bases are adjustable in length from 45” to 68” to accommodate tables that are 45” to 72” long and tops that are 24” to 36” deep. The hand crank location is in the fron of the table and it retracts under the table. Available in powder coat Black or Silver. Ships via UPS/FedEx Ground.