Small knowledge of buying a door latch

The bathroom in the home is made of old-fashioned door latches.It takes about half a year to appear aging. Now replace it with a new door latch from Degol hardware, stainless steel, moisture-proof and rust-free, not easy damage! (My kitten is too naughty)

Pay attention to the purchase of the door latch: 

1.whether the location of the use is indoors and outdoors

2.which texture

3. whether the pin rotation is smooth.