Click to expand Tap to zoom Chain Knocker for 50mm Pipe (#RS-1050-DR) by Renssi Save Liquid error (product-badge line 32): -Infinity% $67.80 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Renssi Chain Knocker For 8mm cable, 50mm pipe, with 3 chains and Drill Head