An M10x75 Galvanised Anchor Sleeve Bolt (or Sleeve Anchor) is a strong pre-assembled fastener for securing items to concrete, brick or block featuring a threaded bolt, expansion sleeve, nut, and washer, with 'M10' indicating metric 10mm diameter, '75' its length in millimeters, and 'Galvanised' providing rust resistance for outdoor/damp use. Tightening the nut pulls a tapered cone into the sleeve, expanding it to grip the hole wall for medium-duty fastening.