Details:* *Tensile column for the 65 manganese steel heat treatment, no rust, long service life*Method of Use: For small holes, slits and grooves of the measurement, used with micrometer or caliper, with knurled locking device*Material: Steel*Color: Silver(As Pictures Show)*Length: Approx. 7.5cm/2.95", 7.8cm/3.07", 8.8cm/3.46", 9.2cm/3.62"*Probe Depth: 0.880,1.200,1.600,1.600"*Model: A/ B/ C/ D*Range (cm) : 3-5cm/ 5-7.5cm/ 7.5-10cm/ 10-13cm*Gauge Range: 1/8"-1/5", 1/5"-3/10", 3/10"-2/5", 2/5"-1/2"*Quantity: 4PcsPackage Contents:4*Hole GaugesNote: The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.