As a PE mgmt person I have no problem getting the equipment or tools my mechanics need to do their job and to do it well. However, if they were constantly causing me problems, complaining about everything, going out of their way to not be what I consider skilled labor I might also have some budget issues on some non-essential, non-safety related items tools. I believe we get more done when we work together. If my guys are successful I am successful, if we are working together as opposed to against each other we are also more successful.
If you are actually a PE mechanic there is a list of tools that you must provide yourself (yes you buy your own to work for UPS, that is part of the deal when you signed up) and there is a list of tools and equipment that UPS will provide. Are your sleeves on either list? You also get a $300 tool allowance every year. After taxes you can buy yourself $180 / $.28 = 642 gloves. That should be more than plenty to last you the 252 days you will work next year.