Features ​Main application-For measuring the pitch of threads and external threads. Durable-Threaded plug gauge, hardened, hardened, magnetic head. Easy to use-Freely adjustable using the rotary switch. Easy to use-Lightweight and sophisticated with precise measurements and simple design Widely used-Useful for checking tool angle when cutting threads on metal lathes. Features: Main application-For measuring the pitch of threads and external threads. Durable-Threaded plug gauge, hardened, hardened, magnetic head. Easy to use-Freely adjustable using the rotary switch. Easy to use-Lightweight and sophisticated with precise measurements and simple design Widely used-Useful for checking tool angle when cutting threads on metal lathes. Specifications: Material: Stainless Steel Type(Optional): US (51 pcs):60 * 60mm/2.36 * 2.36" Metric+ imperial (52pc): 67 * 20mm/2.63 * 0.78" Measuring rang: 0.25 - 6.00mm/0.0098" - 0.23" 51 pcs 60°US.system: 4,4.5,5,5.5,6,7,8,9,10,11,11.5,12,13,14,15,16,18,20,22,24,26,27,28,30,32,34,36,38,40,42,44,46,48,50,52,54,56,58,60,62,64,66,68,70,72,74,76,78,80,82,84 52pcs 60°Metric/Imperial: 60°Metric:0.25,0.3,0.35,0.4,0.45,0.5,0.6,0.7,0.75,0.8,0.9,1.0,1.25,1.5,1.75,2.0,2.5,3.0,3.5,4.0,4.5,5.0,5.5,6.0 55°Imperial:4G,4-1/2G,5G,6G,7G,8G,9G,10G,11G,12G,13G,14G,16G,18G,19G,20G,22G,24G,25G,26G,28G,30G,32G,36G,40G,48G,60G,62G   Package includes: 1 x Thread Measuring Gage     Package List