ESCA Tech Inc. has designed a pocketsize test kit for detecting the presence of lead. This kit is ready to use with no mixing involved. There are no parts to break, no chemicals to mix and there is no unpleasant odor. Each test kit will perform 20 tests and quickly detects the presence of lead, as low as 20 micrograms, on skin, floors, tables, shooting rests and other firing range areas. When lead is present, a yellow color will immediately appear when the area is tested according to the directions provided.