This is a better way of adjusting the screws on your Anet A8 when levelling the bed. This mod requires you to drill out the threaded holes in the aluminium H frame (use a 3mm drill bit), they will wear out eventually anyway.
Push the wingnut into the thumb wheel.
Use a spare M3 nut to clamp the screw to the heated bed.
Fit a cup on either end of the spring, place it over the screw and press the screw through the enlarged hole in the H-frame and screw on the wingnut.

To level the bed now, there is no need to use a screw driver.

Hope you like this upgrade.

Anet A8

Yes

No

0.1

100% & 30%

I printed the spring cups at 100% infill for extra strength.
I printed the thumb wheel at 30% infill.

There are probably loads of variants of this design, this is probably very similar to other designs. I am trying to design all my own upgrades for the Anet A8, some will be based on what I see but they are all my own design unless stated otherwise.

The thumb wheel is a good tight fit on the wingnuts which came with my Anet A8. The Spring Cups have a 3.5mm DIA hole for the screw. I have oversized it by 0.5mm to account for printing accuracy.