The Hillman Group 370057 Toggle Bolt, 3/16X4-Inch, 50-Pack Product Description Toggle bolts come with spring-action wings and are intended for anchoring into hollow walls. The wing is designed to spread apart behind the base material upon installation for firm hold in hollow wall applications. The wing disperses the weight of the secured item over a larger area, increasing the weight that can be secured compared to a regular bolt. From the Manufacturer Toggle bolts come with spring-action wings and are intended for anchoring into hollow walls. The wing is designed to spread apart behind the base material upon installation for firm hold in hollow wall applications. The wing disperses the weight of the secured item over a larger area, increasing the weight that can be secured compared to a regular bolt. Features Durable toggle bolt great for hanging objects on hollow wall Comes with spring-action wings Features a slotted round head machine screw Pre-drilled hole required for installation 50 pieces per retail package USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.