The most reliable way to obtain the extension is through the developer's official channels. Since it is a paid professional tool, avoid unofficial "fix" files which may contain malware.
Includes commands to change rebar patterns, generate stirrups (90° to 135°), and create "bar cut lists" for material estimation. Download & Fix Guide toh rebars v120 extension for sketchup download fix
# PATCH FOR V120 ON SKETCHUP 2020+ if Sketchup.version.to_i > 19 UI.menu("Plugins").add_item("TOH Rebars V120") UI.open_panel("TOH Rebars", "TOH_RebarsV120/index.html") else # Original code here end The most reliable way to obtain the extension