I'll start by saying I really like Gravity products for their quality and solid build, and this bar doesn't disappoint. Small and sturdy, this T-Bar is versatile allowing you to mount fixtures either above or below. Fixtures are attached using Spigots which stay attached to your fixture and are then simply clipped securely and quickly into the bar. An Allen key is included and can be stored in the bar - so no searching around for tools to adjust the bar width - another innovative touch from Gravity. These T-Bars looks smart - as do all Gravity products - and can be mounted to any 35mm pole. These bars feel "strong" so don't anticipate any sagging if your going to mount larger fixtures. Great quality, durable, innovative features, quick and secure to use. Highly recommended, gets 5 stars from me. Thanks djkit.com