Shaft
Diameter
Inside Post
Diamter Round
Inside Post
Diamter Square
4x4 Post 6x6 Post
Wood Metal Wood Metal
10" 3-5/8" 3-5/8"
12" 7-5/8" 7-5/8"
14" 9-5/8" 9-5/8"
16" 11-5/8" 11-5/8"
18" 13-5/8" 13-5/8"
20" 15-5/8" 15-5/8"
22" 17-5/8" 17-5/8"
24" 19-5/8" 19-5/8"