As we all know, viscosity of gel ink pen writing medium is between water-base and oily. This provides a smooth handwriting and helps improve your writing quality. Are you tired of those boring gel ink pens that are all in the same key? If so, why not come and have a look at our knife shape gel ink pen here, you may find what you want.Designed in original knife shape, this roller pen provides smooth and dependable writing. Ribbed finger-grip ensures writing comfort as you can hold it tightly. Unique design of this roller ball pen is novel, compact and elegant, which is fashionable and attractive to you. With humanity designed dimension, this gel ink pen is easy to carry and convenient to use. Fluent writing as well as no ink leaking problem are the basic reasons people would come here again and choose them once more. As the stylish and personalized design, this gel ink pen is a good gift choice for your friend, and of course you can also keep this gel ink pen yourself as a collection.In a word, this gel ink pen can be used in many occasions and you will love the writing instruments. Just choose this gel ink pen and show the good taste of yourself!