The DeFelsko AT50CKIT 50 mm C1583 Conversion Kit for PosiTest ATM or ATA Adhesion Testers is an accessory for the DeFelsko Adhesion Testers. Interchangeable stand-off allows a PosiTest ATM or ATA to pull 50 mm dollies conforming to ASTM C1583. It is ideal for measuring the tensile strength of concrete surfaces and concrete repairs and overlay materials. Conforms to ASTM C1583. Includes 50 mm C1583 steel dollies (4), 50 mm diamond grit cutting tool with arbor and 50 mm C1583 stand-off.