Stud anchor is quick & easily to install & set plug in with hammer Strong holding power special designed to THREAD DIA=ANCHOR DIA=HOLE DIA. Item code Thread size Anchor Dia. Anchor length(L) ThreadDepth insertDepth DrillDia. STUAN-20500 W1/4 6.4 50 20 30 6.5 STUAN-25550 W5/16 8.0 55 25 35 8.5 STUAN-30650 W3/8 9.5 65 30 35 10.0 STUAN-30A00 W3/8 9.5 100 30 40 10.0 STUAN-30A20 W3/8 9.5 120 30 40 10.0 STUAN-30A50 W3/8 9.5 150 50 40 10.0 STUAN-40750 W1/2 12.7 75 30 45 13.5