Comprehensive thread sizes 26 total sizes: 14 imperial and 12 metric Imperial range: 632 to 1/220 Metric range: M40.7 to M121.75 Quickly identify both standard and specialized thread patterns for nuts, bolts, and threaded holes Durable aluminum construction Made from aluminum alloy for strong, longlasting performance Provides good wear resistance and reliability in workshops, garages, and outdoor environments Lightweight yet sturdy design resists deformation with daily use Detachably portable design Detachable wire loop for easy transport and storage Separate individual gauges for taskspecific use or carry the full set Spacesaving design ideal for toolboxes, workbenches, and field work with quick access Clear visible markings Permanent color coded markings: red for metric, blue for imperial Oxide layer coating keeps markings crisp and legible over time Clear identification reduces guesswork and helps you select the correct thread size quickly, even in low light Practical use scenarios In a , identify the unknown thread size to the correct nut or bolt without trial and error Onsite field maintenance, verify thread compatibility for equipment before proceeding with repairs At home projects, confirm thread size before drilling or tapping to prevent mismatches and rework