Tools / materials: automatic retraction tape measure, dry cloth

Use steps / methods：

① Take the small tape measure out of the box

② Hold the tape measure in one hand,pull out the ruler belt a uniform speed

③ Stretch the ruler belt to the required length and press the lock button to prevent the ruler belt from being automatically retraction

④ record requires measuring the numerical of an object

⑤ After reading the numerical record, release the lock key, recover the ruler belt, and wipe the belt and product with the dry cloth when ruler belt is retractioning.

⑥ Use the dry cloth to intermittent hold the ruler belt  when the ruler belt is recycled，let the ruler belt retraction slowly,prevent ruler belt too fast retraction，let you'll have your hands hurt.

⑦ When you have finished cleaning, put the tape measure back in the box so convenient for you to use next time.