This is a staffing company, however they will not give you any information about the job they are offering you. They will not provide the name of the company or any pertinent information about the job they are offering.
They don't give you any info on the job so that you don't go directly to the company and apply that way. They are paid to bring in candidates, so if you were able to find out that company X is looking for people who do what you do, you could apply to them directly and the recruiting company will lose the money they would have gotten from bringing you in.