The Hillman Group 372054 Hammer Drive Anchor, 1/4 x 1-Inch, 100-Pack , zinc Product Description Die-cast zinc. Steel pin. 100-Pieces per pack. Made from high quality materials and highly durable. From the Manufacturer Hammer drive anchors are used for light duty fastening. Best suited for dry, and or indoor environments. Do not use for overhead installation projects. They can be used in base materials such as brick, concrete block and concrete. These are permanent and cannot be removed without destroying. Features Anchors are very useful in holding any material together Not the best choice in wet/damp environment Permanent anchor Made from high quality materials and highly durable 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.