The torpedo level has a small rectangular body with tapered ends. It has three vials to determine vertical, horizontal or 45 degree angles. Its short length allows use in tight spaces or simple tasks such as hanging a picture. It was used by Jillian Gross while working for Habitat for Humanity, a not-for-profit, non-government organization advocating affordable housing around the world.
When Hurricane Katrina struck the Gulf Coast in August 2005, Jillian Gross had worked with Habitat for Humanity for three years learning woodworking and house-building skills. Groups such as Habitat for Humanity marshaled volunteers, tools and lumber to step in when it became clear that normal avenues of housing assistance were overwhelmed.
In November 2005, Habitat for Humanity launched “America Builds on the National Mall,” a demonstration house-building marathon in Washington, D.C. in which the basic components of 51 homes were assembled within a week and shipped to the Gulf Coast. Upon completion of the project Ms. Gross, one of the house building leaders during this event, donated her tool belt, tools and protective wear to the Smithsonian Institution.