The Master Mechanic Air Chisel Set includes 4 different tools: a punch, splitter, weld buster, and chisel. These tools are powered by a 110V air compressor and are designed for various mechanical tasks. Made in China, this set is a versatile addition to any workshop, offering efficient and precise results. It is important to note that this product may not be suitable for use in areas with California Prop 65 Warning due to potential health and safety concerns.