Strong Zinc Plated Steel. Practical Design. Easy To FitDimensions: 96 x 40 x 10mm (Flat) Fixing Holes: 4mm. If you have not used this type of hinge before strut hinges are worth considering for new designs or upgrading old cabinets. These are designed to keep the lid from opening too far- providing a more stable hinging arrangement for heavy lids. Made from zinc-plated steel- this type of hinge can be retrofitted to most designs and will provide a practical solution for keeping lids in place.. strut hinge