Answer:
A type of hammer that brings a room to order.
To unravel me you need a simple key, no key that was made by locksmith's hand. But a key that only I will understand.
A little pool with two layers of wall around it. One white and soft and the other dark and hard. Amidst a light brown grassy lawn with an outline of a green grass.
You use it between your head and your toes, the more it works the thinner it grows.
The more you take, the more you leave behind.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?