ER16 Collet vs Precision collet

[Michael Simpson Virgina]

I see that PreciseBits has a ER16 kit for the Bosch and Hitachi routers. Am I better off going with this on my routers than the PC adapters? What are the advantages?

[John M Torrez]

The main advantage to the ER16 kit is it will allow you to use standard ER16 collets which are made to clamp every shank diameter from 1/16 to 13/32. On the down side it will add more runout (as anything you add between the router and the bit will), and you will loose some Z height. Basically unless you need to clamp to shank sizes that you can't get collets for the precision collets are the better option (at least in my opinion).