If you need to use .125" cutters in your Carbide Compact Router, these are for you. This kit includes: * .25" Precision Collet * .125" Precision Collet These are made in the US for Carbide 3D. NOTE: These collets are included with the Carbide Compact Router. These are available separately only for replacement. The Precision Collets are not compatible with the Carbide Compact ER-11 Router or the VFD Spindles.