These brackets are well made and tested as a square with my locksmith square. My only complaint is with the included hardware: the kit includes four M3 10mm countersunk screws for mounting the motor, both of which have the wrong head (the holes are NOT recessed) and are too long for a standard NEMA17 motor frame; You have to deal with 2mm extra length. Obtain a pack of 25 (or more) M3 8mm dome, button, button-head, button-head or socket head cap screws (NOT oval, countersunk/flat, etc.) toβ¦