Features 1、With hardened probe, this dial indicator set is very suitable for high-strength measurement. 2、The dial scale is clear and the reading is intuitive and convenient without reading problems. 3、With heat insulation and non‑slip thick handle design, this dial indicator feels more comfortable. 4、Made of aluminum alloy, this dial indicator set is very sturdy and durable after long time use. 5、Contains a full set, this dial indicator is very easy to install and operate for novices. Specification Item Type: Dial Indicator Set Product Material: Aluminum alloy Measuring Range: Approx. 50-160mm / 2-6in Measuring Depth: Approx. 150mm / 6in Accuracy: 0.01mm Package List 1 x Mandrel 1 x Dial 1 x Extension Tube 4 x Limit Ring 12 x Extension Rod 1 x Screw 1 x Black Fixing Notch 1 x Silver Fixing Block 2 x Buckle 1 x Fixing Bolt 1 x Storage Box 1 x User Manual