Tricep extensions develop the muscle required for reaching overhead and pushing oneself up from the wheelchair so as to avoid pressure sores, or to transfer to and from the wheelchair.
It also adds size and definition to the triceps muscles, for that tee-shirt
While other machines such as the rickshaw allow those with quadriplegia due to spinal cord injury to do tricep extensions, the UPPERTONE provides superior development as it has a flexible free hanging rickshaw handle, rather than the rigid arm on conventional rickshaw machines.
This has two advantages. First, for someone with no or very little triceps the UPPERTONE's free hanging handles allow sufficient flexibility to allow other muscles to compensate for the triceps.
Second, the free hanging system also helps quadriplegics develop a sense of balance and directional control. Such training is not possible with the conventional rigid arm machines.