/ Precision Measuring Tools / Precision Hand Tools / Squares / Combination Squares / 434-18-4R * Not actual product image 51544 434-18-4R 18" Combination Set with Square, Center and Reversible Protractor Head and Blade 51544 Other similar products The Starret 18" Combination Set with Square, Center and Reversible Protractor Head and Blade has the same features as the 435 Series except that the square heads and center heads are forged, hardened steel with smooth, black enamel finish. 18", 4R Grad. Features Specifications !Customers are also viewing Contact Starrett Features Reversible lock bolts, scriber, spirit level in both square head and protractor head Direct reading double 180 Deg protractor scale Hardened steel, machine divided blade Regular Finish Blade Forged and Hardened Steel Heads with Smooth Black Enamel Finish Specifications Blade Length (in): 18" Blade Finish: Regular Graduation Type: 4R Graduations: 8ths, 16ths, Quick Reading 32nds, 64ths Head Finish: Smooth Black Head Material: Forged Steel Head Types: Square, Center, Protractor Number of Pieces: 4 Protractor Type: Reversible