As a professional tradesman you can't go wrong with the BM 40 tape measure with its double-sided scale for optimum readability. This is a solid heavy-duty tape measure with a hard-wearing blade surface to prolong its working life. The Stabila spikes hook can securely hold without slipping on building materials, & with the choice of various blade lengths, up to 10 meters, you can find the right version for your measuring needs. Accuracy class II.