Mobile mechanic write off for tools

With starting a mobile mechanic business, how do you deduct the expenses for tools?  Can you deduct the full amount spent if you have a receipt, or do you have to amortize the write off over a period of years/months?  For instance a $1600 expense was incurred for the purchase of multiple wrenches and socks.  Do I write that entire amount off in my 2021 tax return?