These Forgefix Sleeve Anchors are through fixing, for ease of use & speed of installation. Their sleeve wedge cones are designed to give maximum expansion even in shallow anchoring depths. They have a reduced outside sleeve diameter compared to thread size for smaller hole sizes, offering reduced stress in base materials. The anchors are Zinc Yellow Passivated for increased resistance to corrosion & have hexagonal heads. Also known as ' Loose Bolt' sleeve anchors. Application: Widely us