ANCHOR LENGTH 1-5/16 INCH; ANCHOR SIZE 1/4 INCH; DRILL SIZE 1/2 INCH; LOAD RATING 1050 LB FOR 2000 PSI, 2370 LB FOR 4000 PSI, 2740 LB FOR 6000 PSI CONCRETE; MATERIAL ZAMAC 7 ALLOY; THREAD LENGTH 5/16 INCH; TPI 20; TYPE SINGLE EXPANSION; POWERS. BRAND