Sport ridge bi-pod heavy duty 6"-9" standard-adjustable FEATURES-Adjustable from 6" to 9"-Durable hard finish-Reinforced tension springs-Precision tension leg locks-Swivel stud or adapter adjustment-Spring assist leg retraction-Matte black finish Other Features: Extensively engineered and precision machined to ensure a lifetime of use,heavy duty springs ensure fast & solid deployment of legs fully adjustable legs lock in extended position,micro adjustable wheel lock each leg at verying lengths,connects to standard swivel studs