Monument pipe cleaning tool is the very best and safest way to prepare copper pipe and copper fittings and comes in 15mm aand 22mm cutting sizes. Long lasting double stemmed brushes clean quickly. Quick thorough tubing prep with patented tungsten carbide abrasive technology, they work 3 times faster and last 4 times longer than conventional tools. Patented ratchet handle makes jobs possible in tight spaces. Eliminates the risk of scrapes or flux burns.Monument MON2915 Copper key Pipe Cleaning Tool. Size: 15mm.