Applied to measure thread and external thread tooth pitch.The thread plug gage, through quenching processing, strong hardness, head with a magnetic.Using rotary switch can be freely adjusted.Easy to use, light and delicate, with precise measurements and simple design, which can be widely used and .It is useful for checking tool angle while cutting threads in metal turning lathes.Type: A:US (51 pcs):60 x60mm/2.36 x2.36inchMeasuring rang: 0.25 - 6.00mm/0.0098inch - 0.23inchSpecification:A:51 pcs 60US.system:4,4.5,5,5.5,6,7,8,9,10,11,11.5,12,13,14,15,16,18,20,22,24,26,27,28,30,32,34,36,38,40,42,44,46,48,50,52,54,56,58,60,62,64,66,68,70,72,74,76,78,80,82,84Color: SilverMaterial: stainless steelPackage Contents:1 x Thread Plug GageOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.