WARNING: This product can expose you to Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to - www.P65Warnings.ca.gov.
Good value & effective.
I use these with hi surfactant oil to clean rifle bores. They are durable & don't have steel cores.
The nylon bristles are stiff & clean well.
I clean these with hot water & laundry spot remover.