Single sided with graduations on both upper and lower edges with numerical markings in centre only Toledo folding rules are precisely manufactured to maximise reliability and smooth operation Blades are locked into place when straightened via an accurately machined rivet function Blades straighten and align perfectly to maintain accurate graduations and measurements One square end and one round end when not fully extended. Square end to square end at full extension Manufactured from stainless steel Type: 6 blade/5 fold Over length: 1000mm Blade length: 175mm Width: 15mm Thickness: 0.5mm Graduation upper edge: 1mm Graduation lower edge: 0.5mm