Estes 2231 Fin Alignment Guide

A precision molded accessory that makes it easy to glue three or four fins to various sized body tubes ranging from BT-20 to BT-80 diameters. Unique and adjustable vertical fin holders can accommodate either 3/32 in. or 1/8 in. balsa, bass or plywood fins. This is a must-have tool for any serious model rocket builder.

Never attach your fins wrong again and remove that painful process of holding them in place while the adhesive dries!