Replacement T-square Assembly + Large Stop is a replacement for users of True Position Tools Cabinet Hardware Jigs ORIGINAL/PRO/MAX who have damaged or otherwise compromised the integrity of their current T-square. Have a damaged large stop or T-square rail? By buying the Replacement T-square Assembly, you can retain all existing accessories for your tool–while ensuring accuracy remains consistent–for significantly less than purchasing an entire replacement Cabinet Hardware Jig. There is no need to attempt to repair your damaged T-square or large stop, which may reduce accuracy and facilitate crooked holes; The Replacement T-square Assembly has been True Calibrated so you can continue to install cabinet hardware with unrivaled accuracy and speed.