parts are good and strong, holes didn't come drilled or tapped. I couldn't find a tap for the regular screws used so I settled with using 4-40 3/8's screws, drilled with a #39 drill and tapped with a 4-40 tap. with a few modifications and know how these parts do exactly what they are supposed to do. i gave 3 stars because of the extra trouble i had to go through to be able to screw the parts together.