Bulk box pack. Lag screw thread. Manufactured from stainless steel. Resists corrosion. No. N220814: Material: Stainless Steel, Finish: Stainless Steel, Overall Length: 4-1/4", Width: 1", Thread Length: 1-1/2", Wire Diameter: 1/4", National Model No.: 2153 No. N220822: Material: Stainless Steel, Finish: Stainless Steel, Overall Length: 4-7/8", Width: 1", Thread Length: 1-5/8", Wire Diameter: 3/8", National Model No.: 2153 Thanks for shopping Hipp Hardware Plus's Online Store for all your DIY and Home Improvement needs. Remember Hipps Help!