The Halder Supercraft non-rebounding, dead blow hammer virtually eliminate bounce back and vibration, making this a very worker friendly tool. Its high quality construction includes a completely welded and sealed canister filled with steel shot. This steel shot absorb the energy when struck. The Supercraft features extremely durable nylon face inserts that allow for a powerful strike yet will not leave marks. These faces can be replaced when worn out, making this an extremely long lasting tool. This is an industrial grade dead blow hammer that is perfect in situations where you need to hit something hard but you don't necessarily want to damage it.