Each spinner comes complete with 5 shaft adapters (5mm, 6mm, 1/4", 7mm, 5/16" shafts).
You don't have to drill out our back plates!
Features a unique nylon insert lock design for attaching the back plate and spinner - giving a solid and secure hold.
Designed with safety in mind.
Simple, easy and safe to install (no need to use the palm of your hand).
Use Allen Wrench size 3/32" (not included).
Easy to paint with all plastic friendly paint so you can match your spinner to your plane theme.