are u talkin bout the chuck?
I have a 4 prong and a 2 prong, I grind the sides and sharpen the ends and I would get one with a removable pin so U can. pull the pin. I pulled my pin and put a sharper point on it.
the ones I got was 19 bucks a pop and I had to do this to make them usable, they was dull But the are holding up well. You want a good bite on the wood.
I would say a good quality chuck that You can afford will Be the best bet.
on the other end a good live center with a pin I guess and made with a good bearing.
I use Jet and they have 2 chucks I seen so far,there is one that is 3/4 and its nice and then another that is larger But the blades that dig in the wood are smaller. I like chucks with blades that grab alot of wood. or are those blades are called something else But I cant remeber
Maybe some of The Pro Builders will chime in and Help to
I just use what works for Me.