https://www.amazon.com/Anytime-Tools-Caliper-Reading-Standard/dp/B00B5XJW7I/ref=sr_1_3?crid=2IV26HEMNWIEV&keywords=anytime+tools+dial+caliper+6&qid=1561526545&s=gateway&sprefix=anytime+tools+dial+cal%2Ctools%2C207&sr=8-3

I got this guy, it's all metal and no batteries required. Has worked great for me so far. Fair warning though, the tips are sharp as shit (ask me how i know lol)

Anytime Tools Dial Caliper 6" / 150mm DUAL Reading Scale METRIC SAE Standard INCH MM https://www.amazon.com/dp/B00B5XJW7I/ref=cm_sw_r_cp_api_i_DbDkFb3P9S4KQ