ANCHOR LENGTH 1-3/8 INCH; ANCHOR SIZE 1/4 INCH; DRILL SIZE 1/2 INCH; LOAD RATING 1830 LB FOR 2000 PSI, 2340 LB FOR 4000 PSI, 3150 LB FOR 6000 PSI CONCRETE; MATERIAL ZAMAC 7 ALLOY; THREAD LENGTH 1/2 INCH; TPI 20; TYPE DOUBLE EXPANSION; POWERS. BRAND