naw fat bar you can make go to home depot or lowes or what ever buy 7-8’ long piece of 2 inch pipe, have them cut that for you, mark off where you want the rings to be with tape so you know where to grip it. Then again at home depot there are these like pipe holder things (sorry dont know what they are called) that you loosen put on the pipe then tighted with a screwdriver to act like the sleeve of the barbell all for sub forty dollars i think. Thats what idid and it works like a champ
What you are thinking of is called a “hose clamp” - they do work very well as collars.
For quick collars you can also pick up the welding clams for about $3 each. They look like big alligator clips and keep a good grip as long as you are not slamming the bar on the ground (cleans/deadlifts).[/quote]
thats it, i use those as sleeve markers but they are to time consuming for collars at least to me, i only use it for benching,curls and tricep shit so none of plates usually fall off but its a good rig.