Description: Clone Download Killer is an internet tool help you check identify of this URL before really download it. CDK would check the duplicate of file name , file size and content snippet. CDK check files with very high speed , in general , within 5 seconds you could see whether you had download the file before . CDK also monitor the click in Internet Explorer , as you click a file type like ".exe;.Zip;.Rar..." , I would automatically check it .