High Quality: Letter Opener Slitter is made of high quality plastic and concealed stainless steel razor blade, more safety than a traditional steel letter opener. Portablel Size: Letter Opener Envelope Slitter size is 3*1.8*0.1 inches, light weight and small size design are for easy to carry, convenient for putting in pocket or bag, as the same time, ideal for a business trip. Keychain Hole Design: Include 5 pcs mail opener with 4 different colors, black, white, red, and green, enough for your daily need and gift for others. A keychain hole design makes it could attach to your keyring, convenient for use outdoors or indoors. Widely Use: Our letter openers with razor blades make you could open the envelopes, mail, and packages quickly, perfect for home or office use, which women, men, and teens could use. Please note: Because the product is a mini-size part, children under the age of three are not suitable for use. It can be used with parents.