8-Inch Divider Compass, Max Span 8.5 Inches by TOOLUSA Much like the compass in math class - instead of drawing circles, you can quickly measure distances Great to use in conjunction with a ruler - measure distance - then use where needed This solid steel winged compass is 8 inches long, and has a 8 1/2 inch long wingspan Knurled knob screws down to hold the compass tight so each measurement will be preserved Made of heavy duty stainless steel - weighs a sturdy 6 ounces, and comes in its own vinyl pouch