You can view the installation instructions for the TKB Drop Leaf Table Fitting Set online. Häfele provides a downloadable manual and diagrams showing how to install the fittings, spacing requirements, and load capacity. Where to Find Instructions - Häfele official site: The product page for Drop Leaf Table Fitting Set, TKB includes manuals and videos. - Direct reference: Look for item no. 642.40.008 on Häfele’s catalog — that’s the exact fitting set you described. - General hinge installation guides: Some furniture hardware sites also provide tutorials on drop leaf hinge alignment, drilling, and fastening.