Safety Concealed Sharp Blade: With the concealed sharp blade design, our envelope slitter can easily open mail, envelope, letter or wrapping paper without effort. Product Content: You will receive 9 pieces of letter openers in black, yellow and white, Each color has 3 pieces. Enough quantity to meet your various needs and you can share with your friends. Portable Size: Our mail opener measures about 8x5.1cm/3.15x2in, which allows it can be easily carried around and put in your pencil case. Product Materials: Made of premium-quality plastic and manganese steel, this envelope opener knife is durable, strong and reliable, not easy to break or deform, which will provide you with long-term value. Ideal Gift: In addition to being a letter opening tool, it can also be used for cutting through gift wrap, packaging, meeting your various needs. This envelope opener tool is also an ideal gift for office workers and stationery enthusiasts.