These rods can be used to clean and remove obstructions from most domestic 100mm (4in) underground drainage pipes. The set consists of ten flexible, screw together rods which can reach up to 9 metres in length when fully assembled. Each 920mm polypropylene drain rod has crimped and pinned rustproof connectors for extra strength and the kit is supplied complete with a 100mm rubber plunger and a 50mm double worm screw. N.B ALWAYS ROTATE DRAIN RODS IN A CLOCKWISE DIRECTION Description : Drain Rod 12 Piece Set