Product Feature: * Great Compatibility: Mini Style Measuring Combo is for Vise or Arbor Use. Great for quick spring height/pressure testing without using a ruler to measure spring height. * Superior Quality: Constructed from superior quality steel, copper and ABS. It features its durable construction, high performance, and long service life. * Specification: Maximum spring diameter is 1.700''. The round dial gauge measures 0-600 lbs. in 10 lb increments, and the precision spring height micrometer has a range from 1.500 to 2.295 in. .