The AFF Viking 4 Ton Ratcheting Jack Stands Set, No. 55040, is designed with a wide pyramid base for added support and security. The multi-position ratchet bar instantly locks into place during adjustment and is made from ductile iron for dependable strength. Its large saddle allows for additional contact with the load and improves safety. In addition, the jack stands feature a high-grade forged steel and welded design for maximum durability. The height ranges from 14" to 21" and meets the 2014 PASE/ASME standards.