🔧 Uxcell A15052100Ux0174 40mm x 40 Degree Mounting Bracket Review

Holes must be reamed with a 3/8 bit. Warning. This alloy material will blunt a standard bit! You will need to use a grinder if you want to remove the tabs. The tabs are best left for the wood but will need to be sanded before attaching to the metal.

They are shaped so that the edges of the inner holes are slightly rough. I had no problem stringing them so I probably reordered 4 or 5 times. I put one of them in a vise and squeezed it. I don't know how hard I pressed it, but it's not torn or warped, so they seem pretty strong.

For some reason these slotted and folded 40 series corner brackets are very hard to find. They have non-slip cleats BUT they don't break off like the regular design. They also need serious tools to remove them, so they can only connect channels that are perpendicular to each other. Connecting parallel channels is not possible because the tabs are locked in the channel.