These telescopic measures are an indispensable aid for measuring clear space during interior refinishing or masonry work. Large numbers allow the scale to be read even in poor lighting conditions. The measures are equipped with extendable rail profiles. If the rail with the red locking screw is fully extended, you can immediately continue measuring using the second rail (yellow locking screw). This clever measuring system does not require any addition. A fixed centre provides practical, one-handed use. Plastic ends prevent surface scratches.