powerstretch=grip rippoff
it operates on the same principle as the Grip-May not be as safe however. The grip provides you with a sheath that you use after the penis has been wrapped to prevent blood blisters and ruptures. I used the Grip once without the sheath and wrap ( I was being lazy and was in a rush)
the result-
A hicky and densitizing on my glans that lasted a month
I do not see that the powestretch comes with any safety sheaths at all to prevent this. Also it does not have a safe way to measure the amount of vacum to use. If anyone buy it and find that this is to the contrary please let us know
PEace