WEEMS & PLATH Marine Navigation 10 Point Divider (6-Inch) *6" equal spacing dividers *Manufactured from highest quality steel *Protective red velvet-lined zippered case included *Eleven numbered points allow easy conversion of distances. *Excellent tool for interpolating isobars or plotting and calculating equal divisions of distance or time *Dimensions: 6" (152 mm) *Weight: 0.22 lb (100 g) *Also used by draftsmen and artists