Review on Zipbolt 40.280 Universal Drill Guide Woodworking Project Kit With HSS 6.5Mm, 8.5Mm, 10Mm, 12Mm, Drill Bits And A 25Mm Carbide-Tipped HSS Forstner Bit by Robert Blair

We used this product for handrails going up a staircase and building a floating railing with no corner post. The joints in the bolts look to be a little bit weak at the pivot point so be careful not to put too much force on them. Test out your pre-drilled hole on a piece of scrap material of the same species of wood to make sure that the bolt goes in snug but doesn't require so much force that you might snap off the bolt in your railing! Use a quality wood glue on your joints, the bolts alone will not hold your railing joints together on their own. They came with oak plugs so if you are using Mahogany like I did or another species you will need to get your own plugs. My carpenters are the best around, you will need to have a very high level of skill and patience to do this. If you are a professional, I would recommend using these.