An M12x130 Anchor Sleeve is a heavy-duty fastener used to securely attach items like brackets, machinery or structure to solid base material such as concrete, brick or blockworking by expanding a sleeve within a pre-drilled hole as the bolt is tightened to create a strong mechanical grip for light to heavy-duty applications. The "M12" refers to its metric size (12mm diameter) and "130" is the length (130mm), making it ideal for deep anchoring and securing heavier loads.