Dubro spinner is constructed of 100% virgin nylon for maximum strength. Pre-trimmed for two blade propeller. Uses a unique nylon insert lock design for attaching the backplate and spinner-giving a solid and secure hold. Four shaft adapters, 6mm, 1/4", 7mm, 5/16", eliminates need to drill out backplates.

Aligning pins in nose cone to backplate and fastening into pre- installed locknuts with the two socket head cap screws. 7/64" ball driver.