Pool Cue Extension Adapter Converter 3/8×14 cuetec shaft to 5/16×18 butt.  Aluminum black 1.75". This adapter converter fits a 3/8×14 cuetec shaft to a 5/16×18 butt (meucci and viking qr). Great price, contact your local cue maker to see the price of their adapters. Then compare. Free shipping to USA.

I have 14 other types adapters as shown. Any questions? Feel free to ask