This design is a little replacement part for the Anet A8.
Mattkis bearing holder (LM8UU-Style Bearing / Bushing Holder) is an awesome replacement for the native metal holder that ships with the Anet A8. But due to the reduced height, the y endstop on my Anet A8 was not triggering anymore.
This part rises the endstop by about 4mm. It is fixed to the frame like the original part.
No special adjustments necessary. Lower resolution should work.