These miniature measuring tapes are not a gimmick, they are easier to read and clearer than other mini measuring tapes with small and blurry numbers. Features a stable slide lock to hold the measurement securely in place Retracts smoothly whenever you release the lock and fits comfortably in your hand for parties: The mini measuring tape comes with a key ring, and easy to carry They turn each set of keys into a cool and handy tool for different measuring activities in Prizes and Gifts: The mini ruler keychain makes a memorable contest or carnival prize, a classroom reward every student wants to get, a cool gift for DIY enthusiasts, and a cool addition to any keychain collection Colour:As Shown Material:Plastic + Steel Package Contents: 40 x Mini measuring tape ( 10 + yellow x 10 + green x 10 + blue x 10) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.