Attached to the Structures Testing Instrument (sold separately), this tester enables you to test trusses built from balsa wood up to 1/4" as well as basswood up to 3/16". Or test double- or triple-width trusses.
Holds trusses up to 5-1/2" tall. Comes with blocks to firmly hold in place triangular trusses with 15°, 20°, 25°, and 30° angles.