Shopping for stationery is that mixture of too much choice and so little time but with the helix thumbwheel compasses you can achieve accurate measurements without severe scrapings or wobblesgive yourself the advantage as a crafter student or hobbyist deck out fine pieces of card measure out precise pieces on wood or simply have the opportunity to do your homework whatever your needs and ideas these compasses can help you achieve accuracycontains a pot of spare leadsideal for technical