Using your GS Lock™ Tape Measure is easy. Just pull out the blade to the length you need. Thanks to its dual - sided blade, you can choose between Metric and Inch measurements depending on your requirements. The end hook guard ensures your fingers stay safe while measuring. When you're done, gently retract the blade. To keep your tape measure in good shape, avoid bending the extra - thick steel blade forcefully. After use, wipe it clean to prevent dirt and debris from building up. Also, make sure the safety rope tether mount with the ring is always in good condition for added security.