This aluminium arm is an RC-scale replacement part produced by GPM for use with TAMIYA GF-01 platforms, supplied as a 1 pc set. It is intended to work with GPM GF055 and GF056 components as indicated in the product name and provides a firmer mounting point compared with typical plastic arms.
The component fits the GF-01 suspension layout at either front or rear positions where the stock arm geometry is required. Installation uses the vehicle's existing mounting points and standard hardware, and no modification to the chassis is expected when installed correctly. The part is aimed at hobbyists tuning suspension flex and alignment to achieve more predictable handling on 1/10 scale models.