Starrett 50A 50 Series Improved Trammel Head, For Use With 3/4 in W x 3/8 in THK Beam, Hardened Forged Steel

• Direct reading 0 - 180 deg in opposite directions, permitting the direct reading of angles and supplementary angles
• Reversible, there is a shoulder on both sides of blade, allowing the tool to be reversed so the same angle can be scribed or measured left and right
• Reversible lock bolt allows choice of which graduated side of the blade faces the operator
• Tempered steel blades with accurate, machine-divided graduations
• A spirit level indicates when the base reference surface is level a feature not usually available on comparable protractors
• The points screw into the heads
• The heads are die cast with black wrinkle finish and have hardened, forged steel divider points
• The heads will accommodate a beam upto 3/8 in THK and 3/4 in W
• Has an adjustable point

(2) Heads, (2) Points and Pencil Socket