The plastic comb opener on this machine operates differently than any other comb opener I have seen before. The hooks from the comb opener are actually part of the punching handle and the teeth are affixed to the machine. In order to open a comb using this machine you have to put the comb between the teeth and slide it over so that it comes into contact with the hooks. Then during the opening process you need to lock the handle into place (using the same feature that allows you to lock the handle for storage) so that you can insert the pages onto your document. Personally, this is not my favorite design for a comb opening system. However, it worked well for the different sizes of combs that I tried up to 9/16".

Construction:

The construction of the GBC C75 is a mixture of plastic and metal. The base and housing of the machine are plastic while the handle and comb opener are made of metal. Of course the punching teeth and mechanism are also made of metal. Overall the machine appears to be solidly constructed and should hold up under moderate use. However, the comb opening teeth seem a little bit thin and might become bent if something was dropped on them. The lock for the handle could also become worn over time. This being said, the C75 seems to be built well for the pricetag.

Recommendation:

I would not hesitate to recommend the C75 for a small office or home office that does a few books a week. The construction is good and it comes with a decent one year warranty. However, for higher volume applications or for offices that need to bind larger documents it probably isn't a good fit. For a little bit more money, it should be possible to find a machine with disengageable dies, an adjustable depth of punch margin, a larger punching capacity and the ability to handle documents up to 2" thick. Still, the C75 has its place in the market and is a good choice for light volume users who need to bind the occasional document or report.

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