The Spring Tools 4-pc Heavy Duty Mechanics Set, No. HD1015, is designed for mechanical and metalworking applications. The set includes a 7/16" heavy-duty center punch for layout and design work, a 7/16" self-centering center punch for centering transfer punch applications, a tapered chisel 7/16" to 1/8" for easy pin removal, and a 7/16" cold chisel for sheering rivets and other protrusions. The tools have a 5,000 lb. impact striking force, have a patented design, and will not damage or scratch metal or aluminum surfaces, the company said. The set comes in a storage case. Made in the U.S.