Robertson screwdriver

English thumb|Robertson screwdrivers Etymology From Canadian inventor P. L. Robertson (1879-1951). Noun en chiefly Canada A type of screwdriver having a square tip, designed to drive a Robertson screw. en Building construction estimating Alonzo Wass 1963 The Robertson-head screw has a square hole in the head, made in three different sizes, and must be driven with a special Robertson screwdriver. en I Know that Name!: The People Behind Canada's Best-known Brand Names from Elizabeth Arden to Walter Zeller Mark Kearney; Randy Ray 2002 The Robertson screwdriver is among the tools found at hardware stores and building supply outlets across Canada. https://books.google.com/books?id=_6cA03bXwhsC&lpg=PA24&dq=%22Robertson%20screwdriver%22&pg=PA24#v=onepage&q=%22Robertson%20screwdriver%22&f=false en Never Hang Wallpaper With Your Wife: Decorating and Renovating From a Guy's Point Of View William S. Peckham; Michael C. Hammar 2007 Robertson screwdrivers have colour-coded handles, to make it easy to determine which size you will require. https://books.google.com/books?id=nl0X3uamHZIC&lpg=PT154&dq=%22Robertson%20screwdrivers%22&pg=PT154#v=onepage&q=%22Robertson%20screwdrivers%22&f=false Related terms en Robertson screw en eponyms