 10.16.17  11:09 pm why not get the kind that has the long eraser that you can twist out as it wears down and replace when it runs out? even if you got a new one each time it would last a lot longer than one with a tiny unreplaceable nub. usually they come with extra erasers (and lead) in the pack. they cost more but it would probably end up the same or less as the amount of pencils you would go through in the same length of time. it likely makes little difference but maybe you might want to try and see if you like it
i like my current brand so much there is no way you are going to get me to change. i buy large packs and they are all different colors. however, i haven't used any pencils in a long time because where i am it is currently the year 2017