My thoughts exactly. I currently have 3 in my arsenal, just sold 3 at Xmas to get down to that number as well. They lose value each month as newer technology comes out. But, if he likes them all and uses them all, more power to him!
They are from harbor freight.
I believe they are hose hangers, but they aren't listed as that.
The stickers say "v shape hang all"
They are only 1.99 each.
Not bad total cost for 11 detectors to hang was about 20 not including having to buy screws in boxes of 50.
#12/1.5" for the brackets. I used #10x2.5" to screw into the studs.
They are alot wider when you buy them. I just squeezed them together and added 1/2" pipe insulation to the arms where I hang the detectors. It's like 1.99 for 6 ft of the insulation. They have sticky sides to close them around the arms.