The F series strength machine, F86 is one Dual station fitness machine, i.e. training the muscles of Biceps and Triceps on one same machine. Biceps Curl / Triceps Extension features a combination biceps / triceps grip to accommodate two exercises in one space saving machine. Single-seat adjustment ratchets for proper exercise positioning and optimal comfort. Exercisers can easily engage the add-on weight with a simple push of a lever to increase the work load.