Shop › Chain Knockers w/Drill Head, Sleeve for use with a 12mm (1/2") Cable Image 1 of 1 Chain Knockers w/Drill Head, Sleeve for use with a 12mm (1/2") Cable from $52.59 Pipe Size: Select Pipe Size 50mm (2")- 2 chain 50mm (2")- 3 chain 75mm (3")- 2 chain 75mm (3")- 3 chain 100mm (4") - 3 chain 125mm (5")- 3 chain 150mm (6")- 3 chain 200mm (8")- 3 chain Quantity: Add To Cart Added!