The man who found me brought me home because he couldn’t find me. The more he looked for me; the more he felt my presence. When he finally found me; he threw me away.

I hold many things, but no one holds me. The more they remove, the larger I get.

I live between two worlds, both inside and out.  I am often beaten, by those from without.

Everyone knows of me
Yet I have never existed
Many will use me
When tasks are detested

Pronounced as one letter and written with three,
Three letters there are, but two only in me.
I’m double, I’m single, I’m brown, blue, and gray,
I’m read from both ends, and the same either way.