ANCHOR LENGTH 1-5/8 INCH; ANCHOR SIZE 5/16 INCH; DRILL SIZE 5/8 INCH; LOAD RATING 2170 LB FOR 2000 PSI, 2960 LB FOR 4000 PSI, 3420 LB FOR 6000 PSI CONCRETE; MATERIAL ZAMAC 7 ALLOY; THREAD LENGTH 1/2 INCH; TPI 18; TYPE DOUBLE EXPANSION; POWERS. BRAND