The hanger bolt is using for the connection between threaded item and wood post, the threaded part can be equippedw with closed body, swageless fittings and other required assembly. Left and right thread with customized thread length are available in Kimraymetal. Any special requirement , please call us 0086-185 6168 8866 or email sales@kimray-metal.com. We are happy to help and will respond within 24 hours. For more information, you can also look at our Technical Pages and Videos.