The 75mm Half-Ball allows you to mount any flat base tripod head, with a 3/8" mount, onto a 75mm bowl tripod. The Half Ball allows you to finely tune the level of the tripod head to make it parallel with the ground. Three set screws in the Half Ball can be used to lock down the tripod head preventing it from becoming loose.
The 3/8" Finger Nuts are used to securely lock the 9.Solutions 3/8" rods to different accessories. The 3/8" Connecting Nut is used to connect multiple 9.Solutions 3/8" rods together, allowing you to make longer rods.
Multiple rods can be used to create larger structures for rigging small cameras, lights, and a variety of other equipment.