"HILLMAN" WEDGE ANCHOR *Bit size = rawl stud dia. *Min imbed- 1/4"=1-1/8", 3/8" =1-3/4", 1/2"= 2-14", 5/8"= 2-7/8",3/4"= 3-3/8" *Zinc plated steel *Boxed *Discovery CON, NBR, SUP, HWU *3/8" x 3-3/4"