All Garnier Limbs® (GLs) are Treehouse Attachment Bolts (TABs) but not all TABs are GLs!  New to the treehouse world, email parts@treehouses.com or call 541-592-2206 before ordering  Michael’s products, this way we can confirm you get what best suits your needs. If you have a sketch, drawing or plans you would like free review, email them to parts@treehouses.com. In your email, include tree type, diameter of trees, dimensions of treehouse length and width of platform, points of load if you know them, treehouse height off the ground and any other information or questions you may have. Depending on the difficulty of the build, we may advise a paid consultation with Michael Garnier. Payment is at time of order and all major credit cards are accepted. Shipping costs are based on the weight of the parts and orders usually ship within 72hrs (sans weekends) and usually takes 3-7days in transit for the Continental US. We are happy to ship Internationally also, taking 6-to 12 days. If you are having an issue ordering online or would like to order over the phone you call 541-592-2206 and we will gladly take your order. For all non-bit returns we ask you please contact us via phone or online via your account with treehouseparts.com, a restocking fee of 20% or $20 may be charged.