A: This PA22 Lag Screw is designed to work with both side and top mount Prova posts.
A: If you are using the metal handrail the posts slide into a groove at bottom of rail and clamp on. If you are using wood handrail the posts come with wood screws in the package. Look for them in bedded in the foam at base of post (If I remember correctly).
A: You will need a drill to pre drill the holes. Do not make hole too large or screw won't hold. Make sure there is plenty of secure wood (thick) to screw into or the post will be loose and unsafe. Use a socket and ratcheting socket wrench to turn in screws. Plastic cap presses on by hand after screw is in.
A: You need a hex bolt to screw this in.
A: Bolt caps are plastic.
A: No. The cap is a gray plastic material that matches the color of the mount that holds the railing post.