ILK1037 Features: * For heavy-duty truck drums * Graduated by 0.005"" and has a range of 6"" to 26"" * For precision measuring of drum diameters, The 8500H measures drum diameters on or off the lathe, and may be used to check out-of-roundness * Easy-to-read dials are shockproof and graduated * This model may be used with No. 9582 checking gauge. * Brake Drum Micrometer for Heavy Duty Trucks * Repair only up to 1 yr