For (extrudes, cuts, holes):
SOLIDWORKS provides several official channels for expanding your design library: solidworks design library download
SolidWorks 2026 Design Library Guide
You downloaded a ZIP file named "Sheet_Metal_Forming_Tools.zip" containing 20 .sldlfp (Library Feature Part) files. supplier CAD libraries
Note: The Design Library itself is included with SOLIDWORKS; you don’t typically “download” the pane separately. What you download or obtain are library content packs, e.g., supplier CAD libraries, Toolbox components, or community collections. solidworks design library download
: Known as the "Amazon of engineering," it offers nearly its entire catalog as free CAD downloads. You can search by part number and download parametric SOLIDWORKS files directly into your assembly. 3D ContentCentral