Tools
Core Drill Adapter Finder
Most return issues come from incompatible connections. Verify your setup here before ordering.
Connection Finder
Select your drill brand and model to find the required compatibility adapter.
Select Brand
Select Model
Standard diamond core bits use 1-1/4" UNC female thread. This tool helps identify if your machine requires an adapter.
Machine Connection
Your drill's spindle thread
BI+
Adapter Required
Adapter needed for standard bits
BI+ to 1-1/4" UNC
Bit Connection
1-1/4" UNC
Standard
Diamond Core Bit