Chain Knocker, Head Type Carbide-Tipped Chain Knocker, Compatible Cleaner Series FlexShaft, Connection Size 5/16 in, Maximum Drain Line Inside Diameter 3 in, Minimum Drain Line Inside Diameter 3 in, Product Type Chain Knockers, Compatible Cleaner Manufacturer Part Number K9-204, Application FlexShaft Machines, Auger Length 3 in, Auger Types Included Chain Knocker, Cutter Type Chain Knocker, For Use With Mfr. No. 64273, Material Steel, Number of Blades 0, Overall Length 10 in