Howlett Machine Works was established in 1921, and has been involved in the manufacturing of a wide variety of components for the construction industry for more than 40 years We've also been supplying Test Fixtures both custom as well as standard to labs all over the U.S.; some of which are; The Howlett Rebar Test Fixture; The Cylinder Bond Test Fixture; An Apparatus for Bonding Strength Test in Center Point Loading; Twin Ram Jacking Setup for use in Dowell Testing; Rebar Wedges More Recently we have been machining test samples for the local test labs in the San Francisco Bay Area Simply contact Mike at the section of our site with your requirements