General description The Draper 39451 150mm Inside Spring Caliper is a precise measuring tool designed for internal measurements up to 150mm. It features a fine ground surface with adjustment via a knurled wheel, ensuring accurate and reliable readings. Compact and easy to handle, this caliper is ideal for professional and DIY use in various measurement tasks. Technical specifications Measurement Range: 0 - 150mm Measures: Internal dimensions System of Measurement: Metric Material: Metal with fine ground finish Compatibility and accessories Compatible with standard internal measurement tasks No additional accessories included Installation No installation required; ready to use out of the box Usage Adjust the caliper using the knurled wheel for precise internal measurements Place the caliper inside the object to measure internal dimensions accurately Other information Color: Blue Package Quantity: 1