From the manufacturer:
Half inch single tom arm and cymbal stand consisting of DWSM799 accessory. SPECIFICATIONS: [1″ upper tube] [1 1/4″ base tube] Also Available in 24K Gold.
Your drum mounting hardware has to do two things really well, hold up your drums and put them exactly where you want them. Enter the 9000 line of tom stands. Made from heavy gauge tubing with oversized tube joints to minimize wobble, and armed with a ball-and-socket adjustment for easy positioning. Stands include 1/2″ diameter tom arms to work with DW TB12 brackets and auxiliary clamp for mounting cymbals or other percussion accessories. Single tom, double tom versions and 9934 and 9999 tom/cymbal models are also available.