I don't currently own any, and as yet have not found the need, probably because I'm not into large or deep turnings needing the extra leverage etc.
One observation I have to make, is that the various tool steel stock materials vary in size between the different makers, understandable I suppose if they are trying to maximise their own range sales, so a 'one solution meets all' needs to have some form of collet/twist lock clamping, don't know enough about them to know if such exists.
One annoying problem that has come up just recently is that tools imported from Aus-NZ (USA?) are described and sold by UK retailers, and in some cases the manufactures UK adverts, as metric I.E. 16mm when in fact they are 5/8".
.005" may be of no consiquence to a piece of wood but can be very frustrating when you have gone out of your way to obtain metric stock only to find it will not fit the the customers handles, so be warned check the actual diameter.