Use for twisting off the sump or canister on many GE single stage filter systems, dual stage filter systems, and reverse osmosis filter systems, Do not use the GE to tighten the water filter housing sump, Overtightening the sump can cause damage to the o-rings and make re-opening the housing sump difficult, You should only hand tighten the housing sump, The GE wrench makes replacing water filters easy, SKU: CWD1686