Its Dial Bore Gauge.Measuring range: 100-160 mm (4-6,5").Graduation: 0,001 mm Standard: GOST 9244-75 (Its easy to find in google).If you need more other tools, tell me, I will do my best to find the tools you need, and will set it for you at eCRATER.ABOUT FEEDBACK:Please, leave your Feedback on the receipt of the goods. For me it is very important to have feedback from my customers. If you have any questions about an item, PLEASE CONTACT with me, I always try to achieve the satisfaction of my clients so that You would like to deal with me in the future.NOTE ABOUT DELIVERY TIMEI try to send the goods you paid during the business - day. Delivery time depends on the carrier
