Strechable pencil case / Strechable pencil case

The color leads refill exposed is easy to stain something and be broken ,so when you dont use it ,pulling the case out can protect the refill .Also the acute refill will hurt yourself that is upwards in the pen ,if you arent careful .pulling on the case ,you can turn the pencil on the pen .of course ,it can be stretched to convenient to sharpen the pencil