zwickey black diamond 170 grain screw in model???

[jacobsladder]

does the zwickeys come in a screw in model...i'd rather not have to use a adapter...thanks..How easy are these heads to sharpen

[Bmac]

According to the Kustom King catalog they have 2 blade models in 135, 160 and 170 grains. 3 packs for $12.25-$14.95  No idea on sharpening.

[ChuckC]

Pretty certain that all those  heads use adapters, whether you install them or they do at the factory.
ChuckC

[acolobowhunter]

They come with screw in adapters installed or you can buy the heads and install your own.  I have been shooting them for over 30 yrs.  The are easy to sharpen.  I start with a mill bastard file and put a longer bevel on them.  Then I go to the stones.  I mounted 2 stones on a 10 degree cut 2x4.  Finish off with a crock stick or leather barber strop.  You will be shaving the hair off your arms in no time ( for a test ).