Shop › Chain Knocker W/ Starbit and Drill head, Sleeve for use with 12mm (1/2") Cable Image 1 of 1 Chain Knocker W/ Starbit and Drill head, Sleeve for use with 12mm (1/2") Cable from $113.88 Pipe Size: Select Pipe Size 75mm (3")- 3 chain 100mm (4")- 3 chain 150mm (6")- 3 chian Quantity: Add To Cart Added!