Metric Precision Tiny T-Rule, 75mmMetric Precision Tiny T Rule, 75mm Micro fine guide holes locate your mark exactly Save time and achive better accuracy Made in the USA of stainless steel Use with a 0. 5 mm mechanical pencil or metal scribe Precision measuring and marking Tiny T Rule has slotted height marking holes at every 32nd on the end. This Metric model offers marking holes at every 1mm, 1 2mm and 1 4mm from 0 to 75mm with slotted height marking holes at every 1mm on the end.