Ok, I'll be nice for a minute and give my advice. I was going to give you the benefit of the doubt and look on your site for some pliers I wanted. Within 20 seconds, I closed your site and went looking elsewhere. Why?
1. Rather than just tabbing the lists over, you need a space between each category on the sidebar so the main categories can be seen easily. Like this:
...Accessories, Oil, Boots
...Specialty Air Tool
Cleaning Supplies
...Mops, Brooms, Rubbish Pails
General Shop Supplies
...Bulk Small Parts Assortments
#2. (main reason I didn't even look) Your categories ****, and the front page is too jumbled. I would much prefer something on the front page like:
Hand tools:
...Sockets
...Wrenches
...Pliers
...Hammers
Then you click on the category (sockets for example) and get:
1/4" drive
3/8" drive
1/2" drive
Swivel
Crowfeet
Impact
Then if you click 1/4" drive you can choose metric/standard, deep/short, etc.
You have SEVEN categories for pliers all in a different spot on the front page, that drives me nuts. There are socket categories all over, wrench categories all over, it needs to be organized. It looks like somebody barfed alphabet soup onto a website.
Edit: I used dots since the board doesn't recognize tabs or spaces.