Hello. Thank you so much for your interest in Moen products. The Moen Preston 24" double towel bar attaches to the wall with a wall anchor and screw. If you have additional questions, please complete the form at http://www.moen.com/consumer-suppoert/contact-us or call Moen at 1-800-289-6636. Our business hours are 8:00 a.m. - 7:00 p.m. Monday through Friday and 9:00 a.m. - 3:00 p.m. Saturday EST.
Thank you for your patience. The distance between the two rods is 2-1/8 inches. The following factors including; wall material, wall thickness and type of mounting hardware will determine the appropriate weight for your application. If you have additional questions, please feel free complete this form: http://www.moen.com/consumer-support/contact-us or call 1-800-BUY-MOEN to speak with us directly.
so far no problems