Features The blades are .030" (0.8mm) thick Blades will measure to 5/16" (8mm) depths Balanced frame and thimble design ensure easy handling and better readability Speeder for quicker adjustment on all sizes Non-rotating spindle prevents blade from turning in narrow slots or rolling off shoulder Starrett satin chrome finish - no glare - resists rust Advanced sleeve design with staggered lines and distinct figures for precise and easy readability Rigid steel frame ribbed for extra strength Extremely hard and stable one-piece spindle Quick and easy adjustment Specifications Made in America: Yes Micrometer Type: Blade Type Micrometer Range (mm): 125-150mm Graduations (mm): 0.01mm Anvil/Spindle Material: Steel Anvil Type: 0.8mm Blade Spindle Type: 0.8mm Blade Thimble Type: Speeder