The Online Component Order system has all the facilities you would  probably need while shopping for the your requirements of building tools.  A brief list  of the facilities and their description is as follows:

1. You can see a list of models that are present in the database by clicking on   the models link. You can directly add the items to your cart from the models catalogue. You can also add multiple items at a time. You can view the details of the items by clicking the link shown in the models catalogue.

2. At any point of time you can view the items present in your shopping cart   by clicking the shopping cart link. From the shopping cart you can remove one or more items, if you want to before making a final order. 

3. There is a search facility, through which you can search any of the items    you want to search for. 

4. You can also use the advanced search option if you know the category in which to search for a particular item you need.