With the arrival of the new Milwaukee 2937-20 covered wire stripper we have machined this amazing adapter so you can keep using the heads you already have. Very careful attention was paid to the 9 sided design. The measurements are tighter tolerance than OEM. Each part was made, anodized and engraved in the USA with domestic material. 

The FM40 threads onto all small body heads with 30mm threads; LR10, LR20, LR30, LR40, AND ALL LR COMPACT SERIES.