Cribbing is often performed as part of lifting/lowering operations. Expressions such as ""lift an inch, crib an inch"" and ""pack as you jack"" are used to remind operators of the importance of cribbing to secure and protect the load. The use of cribbing also allows for the use of a lifting device with a limited working range (such as a jack, lifting air bags or hydraulic rescue tools) as the load can be raised to the maximum range of the device, then lowered a short distance onto the cribbing, allowing another platform of cribbing to be built to raise the device and repeat the process.