We highly recommend trying one out to see by yourself,it's a great choice for a quick cleaning.You can clean as below steps: 1.Spray some cleaning fluid inside the barrel or the front area of snake before brush;2.Drop down the black string through your barrel and chamber, let the brass weight drop through;3.Grab it and pull firmly but slowly,and the solid embedded brass brush will remove the stubborn stains;4.The snake works still through the bore,and are extremely tight to ensures all particulates are removed from the barrel even chamber;5.Grab the handle at the end of snake simultaneously, pull back and forward to clean plenty; 6.Place one or two passes with this as you need.We also have multiple sizes for option:(1) 17 Cal .177 Cal .17HMR .17WMR & 4.5mm(2) 22-.223 Cal & 5.56mm(3) 30-.308 Cal.300.303 & 7.62mm(4) 357, .380, .38 Cal & 9mm(5) .40-.41 Cal(6) .44-.45 Cal(7) 12 GA Gauge (8) 20 GA GaugePackage Content:2 x Bore Cleaner Snake