The Box Stock Kyosho KT-531P Transmitter is great for beginners and racers alike but the handle is very thin and most likely designed to be a universal fit covering kids hands as well as being functionally usable for adults.
Handle adapter easily snaps into place and increases the size of the handle so your trigger finger will fall more naturally into position as well as providing a more comfortable ergonomic grip!
Available in M (Red in photos and video), L (Light Blue in photos and video), & XL (Black in photos) sizes
The stock handle is ~32mm (across webbing engagement point) ~40mm widest point near the base.
