The Heavy Limb Treehouse Attachment Bolt is the bigger, badder version of a standard TAB. Known as the HL TAB, it is a 1 3/4" 4140 heat treated steel shank with a mild steel 3" diameter boss hydraulically pressed on to fit. It eclipses the load capacity of a standard TAB by up to 3 times. We use this custom bolt in tandem with custom hardware and our HL versions of the DUA and SUA brackets. It can also be used with a HL suspension system. This massively strong TAB requires a different pilot bit in the Combo bit and a 1 3/8" x 18" auger bit so make sure to order the appropriate accessories.
This is serious hardware for a serious treehouse project. As with all our hardware when installed correctly in a properly designed treehouse, they are quite arboreally friendly.