Digital Dial Indicator with Magnetic Base 0-1 Inch/254 mm Conversion Auto Off Featured Measuring Tool With 22pcs Testing Tips Overview: The set includes 0-25.4mm/1 inch digital dial indicator and 155 lbs (70 kg) magnetic base. Features: Digital Dial Indicator Large LCD Display with 3 Digits Measuring Range from 0 ~ 25.4 mm (0 ~ 1 inch) High Resolution up to 0.01 mm (0.0005") Switchable between mm and inch Zero Setting Magnetic Base Strongmagnet surfaces with ON/OFF control provides 155lbs (70kg) Max Pull (30mm and up thickness metal countertop/surface required for 155lbs pull) With fine adjustment knob for precise positioning. Flat back or lug back option included (hole size 5/16 inch, 8 mm). Specifications: Dial indicator Measuring Range: 0 ~ 25.4 mm (0 ~ 1 inch) Resolution: 0.01 mm (0.0005 inch) Response Time: 0.5 m/s Operating Temperature: 0 ~ 40 (32 ~ 104 ) Storage Temperature: -20 ~ 70 (-4 ~ 158 ) Relative Humidity: 80% R.H Material:Aluminum Alloy Power: 1 x 1.5 V LR44 Button Cell Battery (Included) Item Size: approx. 122 (L) x 55 (W) x 26 (D) mm (4.80 x 2.17 x 1.02 inch) Item Weight: approx. 129 g (4.55 oz) (battery included) Magnetic Base MaterialSteel Weight1304.5g Magnetic Base Max Pulling Power: 155lbs(70kg)( Requires a metal work surface/surface with a thickness of 30mm and above! ) Magnetic Base Dimension: 2.51" x 1.93" x 2.2" (6.37 x 4.90 x 5.58cm) Total Height: 14.2"(36.06cm) Lower Arm Dimension: 6.7"(17.01cm) Upper Arm Dimension: 5.9"(14.99cm) Clamping diameter5/16 inch ( 8mm) Package Include: 1 x Digital dial indicator 1 x Magnetic Base 22 x Testing tips 1 x 1.5V Battery 1 x Instruction Manual 1 x Carrying case _x000D_ _x000D_ _x000D_ _x000D_