EFFECTIVELY PROTECT PRIVACY & SAVE TIME:Use this stamp to roll over personal info in 2 seconds flat and save a ton of time.Effectively used to hide social security Number, bank statements, shipping address, tax documents, junk mails, address on bills,and many more. A GREAT GIFT TO REPLACE THE SHREDDER:Anybody have that stack or box or bin of papers they intend shred? Came across this little gem. Suit for everybody in your family no jammed shredder, no waiting,no paper dust . Also there is NO smell or transfer ofink to skin. Its a brilliant little gadget. UNLIMITED RE-INKING:Total length of stamp coverage can reach 100 meters. approximately cover 3,200 impressions.Pattern width is 0.78 inch.Ink can be refilled in the stamp side when ink runs out. EASY TO USE:This stamp has two distinct parts, the advanced roller to block out your personal information and the knife which can be used as a letter opener or a box cutter (opener). REFILL OPERATION:Unscrew the cap of the ink bottle (not disposable, it can be re-capped and reused), and then insert it into the hole on the side of the stampthen invert. Let it sit for 5 minutes or so to get most of the ink in it.