The Checkline AD-100-D Type D Shore Durometer for Hard Rubber and Plastics is the genesis of years of experience offering high quality Durometers to discriminating users. Featuring an 18mm footer that offers high stability and conforms to all international standards, the AD-100 is the ideal durometer for a wide range of shore hardness measuring applications. The AD-100 displays hardness readings on an easy-to-read analog scale calibrated in 0 to 100 Shore units. An optional MEMORY POINTER holds reading until manually reset, allowing operator to concentrate on measurement task. Also valuable if used in a position where dial is obstructed.