The SPI 21-529-3 Horizontal Dial Test Indicator features a 0 to 0.06 inch Range, 0.0005 inch Dial Graduation on an easy-to-read 1-1/2 inch diameter White Dial with 0-15-0 Dial Reading. Accurate to 0.0012 inch. Easy-to-Read Graduations; Universal Positioning Capability; Jeweled Bearing Design; Resistant to Magnetic Fields; Carbide Contact Swivel 210 degree; Supplied with 3/8" Dovetail Stems; Short Form Calibration Certificate Included; Furnished in Fitted Case. For over 60 years, SPI has introduced innovative products to the metalworking and laboratory industries. SPI measuring instruments are durable, precise, and reliable — all backed by an Industry leading 2-Year warranty.