2 of three screws fit very well. Both thread 1/4 ", 3/8" excellent go outside. The rudimentary screw head is practical because so the screws can never in 3/8 "threaded hole disappear. Make a very hard and stable impression. But at the 3. screw the threaded core near the head was too thick, it could not be purely turn to the head. These returned! 33% botch is too much, therefore only 3 stars!
