Mk1 Large Calipers - Yard/Meter Stick Attachment

With this product you can quickly convert any yard or meter stick into an easy to use set of Vernier Calipers. While not in use, this product is small and easy to store or transport. The product requires the following hardware. Three 6-32 x 3/4 Machine Screws 6-32 x 2-1/2 Machine Screw 6-32 Hex Nut 6-32 Wing Nut 1/4-20 x 3/4 Thumb Screw 1/4-20 Hex Nut Find on Shapeways https://www.shapeways.com/product/5FXVJ776U/large-caliper-yard-meter-stick-attachment?optionId=148068306&li=shops