Keep The Same Size / Keep The Same Size

Using the principle of the retractable lipstick and lipstick,you can choose the size of your eraser whatever you like,and keep the size no matter there remains just a little.There is a lid in the packing,to keep the erather from getting dirty and avoid the eraser crumbs get into the pencil box.Also,in this way,our hand can not touch the eraser directly,which can keep our hand clean and retain our backpacks and school supplies tidy.