Atomic Tackle Anchor Tungsten Putty is a dense, highly malleable rig putty designed for fine-tuning at the rig end, whether balancing hook baits or pinning down a hooklink. It is soft when first taken from the container but hardens in the shape you have created once in the water. The putty is lead free and non toxic, and it is available in two colour ways to suit different angling situations: Silt Brown and Weed Green.