RANDEN compasses and plotting products sell well when they are just marketed,especially thanks to the unique design and technlogy. Take compasses as anexample,it firstly use QUICK-DRAW to replace the traditional compressed bar,which both ensures the precision and easy operation.The originally fixed nodes may be turned swiftly and be adjusted to a most suitable place by users.For rudimental and basic types,ONE-SIZE is used.Users need nor buy new fittings.In terms of materials,it uses zinc-aluminum alloy to replace the traditional iron and coper,which reduces the weight of product on the basis of assured precision.In addition,the production cost is greatly reduced.These are the innovated design of RANDEN Compasses.