DiscDefender Game Defenders (30 Pack Refill) Requires 10-pack Starter Kit) Protect your discs while the laser reads right through it. Apply in seconds using the DiscDefender/label applicator Video instruction is available on website at www.discdefenders.com Works on all of your used and new optical discs including DVD and game discs, music CD's, CD-R's, CD-RW's and software discs. Safe for use in all disc players.