Size Weight Length of Each Punch: 70.4mm/2.77" , letters height: 1/2"(12.5mm), stamped impression depth about 1.2 to 1.4 mm. item weight: 121g/4.27oz Package Included9 numbers(0 - 8, use the 6 as a 9). MaterialMade by quenching treatment alloy steel, high hardness up to HRC 65, suit for hard surface. ApplicationIt can be used to stamp soft metals, including aluminum, tin, copper, brass, nickel silver. And most leather and wood as well. but stainless steel is not suitable. Convenience Storage BoxPacked numbers in 1 plastic boxes respectively. easy to carry and use.