Blue plastic wall plugs are low-cost expansion plugs for masonry and concrete that are sold loose in a jar. Features 1. The drill bit has a tapered end that makes inserting it into the hole easier. 2. The Wallplug is intended to expand across its entire surface and length. For more info: - https://www.ripperonline.com.au/products/blue-wall-plugs-8mm-x-38mm-500pcs