The HOLDRITE #101-18-R & #101-26-R are Copper-Bonded steel bracket with extruded holes. The #101-18-R has 5/8" holes on 2" centers. The #101-26-R has 5/8" holes on 2" centers and 2-7/8" holes on 8" centers. Each to support 1/2" or 3/4" copper tubing. The #101-18-R & #101-26-R position copper water supplies for sink, water closets, and other fixtures. When soldering, heat the pipe, not the bracket.