Plastic shredders are used to recycle plastic items such as bottle tops and old plastic milk or juice bottles. However, these tend to be most used in industry. Unless you are a manufacturer I would not recommend purchasing these (e.g. to use in your own home)
Not all paper shredders shred plastic cards as the plastic might damage the shredder (if the shredder is poorly made). They can all, obviously, shred paper and paper documents.
CD shredders are best used for shredding CD's DVDs or credit cards. This can be used for the home and office where separate slots are provided for the item you are desirous of shredding.
There are private companies, and then there are mass companies. Shredders come in so many sizes. The mass companies use shredders as service to companies which offer quick shredding for paper. Others may make smaller shredders used for at home or by one person.
There are many places where one can purchase a cardboard shredder. Best Buy sells shredders in their stores that are able to shred anything from plastic to cardboard. Cardboard shredders can make significant profits or generate cost savings for businesses. Small and medium enterprises are just as likely to benefit, with the right machine. Within the EU, you can buy, try or hire cardboard shredders from UK Shredders.
Plastic shredders can be found at local hardware stores such as Lowe's or Home Depot. Alternatively, they can also be found online at merchant sites such as Amazon or eBay.
According to the website; www.consumersearch.com/paper-shredders-reviews, the Fellowes PS-79Ci is the best brand of crosscut shredders.
Garden shredders can be bought at your nearest garden store. Walmart also stocks garden shredders and you will also be able to find some at a pawn shop.
There are many places where one can purchase paper cross shredders in California. One can purchase these shredders from retailers such as Office Max or Office Depot.
Mega Shredders - 2013 is rated/received certificates of: USA:TV-14
The prices range for industrial shredders can start as low as twenty dollars and range as high as over one thousand dollars. The price of shredders can be compared at Price Grabber.
Diamond cut is similar to cross cut shredders. Micro cut shredders are the highest of security levels in regards to shredder (super micro cuts are the highest, security level 5, micro cut shredders are level 4).
There are actually several types of shredders. But the crosscut shredders and the regular but inexpensive strip shredders are the most common. The crosscut shredders cuts the paper into small rectangles or diamonds kinda like confetti. While the strip shredders cuts the paper into long centimeter sized strips. Check out http://en.wikipedia.org/wiki/Paper_shredder for more information.