A
dvantages: high-end surface, feel good,
easy customization without tooling cost,it can be fit for round shaft, spline shaft, D shape/half shaft.
B
: solid aluminium knob with plastic core,push fit on shaft
Advantages:
high-end surface, feel good, easy customization, different core fit for spline/ D shape shaft.
C
: aluminium shell with plastic core
Advantages: light weight, cheaper price, need tooling cost to do custom dimension.
Quality: A & B > C
Price: C > A & B
