Refined steel is more durable, and the corners are smooth without damaging the key shaft
Clamp both sides of the key cap, lift up to remove the key cap, insert the two tips of the shaft puller into the hole of the key shaft and pull up to pull out
The hand is comfortable and good to power, easy and effortless
Note if your keyboard is a hot-swapable mechanical keyboard, mechanical keyboards with welded shafts will not work