The Hillman Group 372057 Hammer Drive Anchor, 1/4 x 1-1/4-Inch, 100-Pack Product Description Die-cast zinc. Steel pin. 100-Pieces per pack. 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 These are very useful in holding any material together Not the best choice in wet or damp environment Package Height: 4" Made in China 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.