Amazon.com: HASWARE Toggle Bolt Zinc Plated Steel and Wing Nut for Hanging Heavy Items on Drywall (1/4" x 3",8 Pcs) : Industrial & Scientific
Toggle Bolt Anchor - 3/16'' x 4''
25R300ATR,toggle spring wing, toggle spring wing anchor;toggle spring wing, toggle spring wing anchor,1/4 X 3 ROUND HD TOGGLE BOLT,Jugenheimer Industrial Supplies, Inc.