The GeoTul (also known as the GeoTool), is a hammer designed by Canadian geologist from Thunder Bay, Ron Tweedie, in 1988 in an effort to produce a tool which would be suitable for both breaking rock or mineral aggregate for samples and also scraping vegetation or removing top soil which may cover an important outcrop. Made in Canada from high quality tempered steel with a shock absorbing hickory handle with grip. The GeoTul features a flat face on one side of the head and a wide chisel edge mattock on the other which allows you to undertake the two tasks is was designed for, clearing an outcrop and breaking an outcrop. The hammer features a 1,1 kg (3 pound) head weight with a 76 cm (30 inch) long handle.