Telescopic Rules for Measuring Window & Door Openings 

NFK stocks a complete range of telescopic rules — the specialist measuring tool glaziers and installers rely on for accurately measuring the width and height of window and door openings before cutting glass or ordering panels. Faster and more precise than a tape measure in tight or awkward spaces, a telescopic rule locks at the exact dimension and holds it steady for transfer to the bench.

• Telescopic Rule — Standard — a reliable manual telescopic rule for quick, accurate measurement of opening widths. Extends and locks firmly at the measured dimension for confident, repeatable results.
• Telescopic Rule with Pins — features end pins for hooking into rebates and frames, ensuring the rule seats correctly in the opening for a true measurement every time. Ideal for measuring into recessed or stepped frames.
• Telescopic Rule — Electronic — a digital telescopic rule providing a precise electronic readout of the measured dimension, eliminating read error and speeding up the measuring process on busy sites.
• Carry Cases (3m & 4m — Messfix Orange) — purpose-built orange carry cases for protecting and transporting 3m and 4m telescopic rules on site. Keeps your rule clean, organised, and ready to use.