The Ridgid 63060 is a 3"-4" T-114 chain knocker auger head for drain cleaning cables. This cable head has chains attached to a rounded head for when vigorous action is required for cleaning scale in pipes and broiler tubes. This knocker is made to fit with C-4, C-6, C-6IC, C-7, C-8, C-9, C-31, C-32, C-33, C-31IW, C-32IW, C-33IW, C-441W and C-451W cables. Why do so many professionals choose RIDGID tools? The answer is simple, trust. Millions of RIDGID tools go to work every day in plants, on construction sites and in countless other harsh environments. One of the design parameters for developing RIDGID tools is efficient operation. We engineer ease-of-use into every product. And, we include innovative features to ensure that our tools and machines get jobs done as quickly as possible without compromising quality.