The Pistol Type Long Arm Dial Calipers are used for measuring wall thickness of tubes / pipes. Milhard Sales Pvt. Ltd. Offers Pistol Type Long Arm Dial Calipers. Milhard Sales Pvt. Ltd. Manufactures Engineer`s Squares including solid Beveled Edge type, Dial Comparator Stands, Thickness Gauges, Precision Machine Vices, Knife Straight Edges, Steel Parallels, Precision Block Levels, Hardened Steel Vee Blocks, Magnetic Dial Stands, Stereo Microscopes, etc. The Pistol Type Long Arm Dial Calipers are useful for taking measurements at locations which are out of reach of micrometers & vernier calipers.