Graber 7/16-Inch Round Spring Tension Rod 11 to 18-Inch Adjustable Width - White, 2 Rods per Pack by Graber

will it hold a bath towel?

Would this hold weight of baby clothes on hangers? Want to use in closet of 1 yr old's bedroom.

Do u sell the plastic end covers separately

Do you install these by simply compressing/releasing the spring? I'm looking for rods that can be easily put up and taken down in moments