EASY TO USEThis thread gauge is applied to measure the thread and tooth pitch of external thread. It is useful for checking the angle of the tool when cutting threads in metal lathes. And the use of the rotary switch can be adjusted freely, very easy to measure. QUALITY MATERIALThis thread pitch gauge is made of quality stainless steel, with good strength and appearance. elegant. Through the quenching treatment, it has strong hardness, and the head has a magnet. Smooth polished surface, anti-rust oil applied to prevent rust. MEASUREMENT RANGEThis thread pitch gauge designed with 51pcs 60 America SAE type measuring range: 4-84, 52pcs 60Metric/Imperial: The 60Metric measuring range is 0.25-6.0, and the Imperial 55 measuring range is 4G-62G. Perfect for checking thread size determination. WIDE USAGEThis screw gauge can be used to check if machine size and mechanical thread is correct; use thread gauge blades of different sizes to accurately measure internal and external threads; the center gauge is used for grinding and positioning thread cutting tools on a lathe.