Triple spoke spanner / wrench - SW-7.2 - from Park Tool USA

Sizes equal to SW-0, 1, 2. The SW-7.2 is nickel plated for years of service. Designed for the home mechanic.

• SW-0 (Black) 80 ga./.127" nipple/3.23mm
• SW-1 (Green) 80 ga./.130" nipple/3.30mm 
• SW-2 (Red) 80 ga./.136" nipple/3.45mm

Essential tool #14 in January 2010's MBR magazine
"A spoke key is an essential piece of kit to carry on the trail and n your toolbox at home. You don't need to be a master wheel builder to straighten your hoops a little. Some patience and practice should enable you to remove side-to-side (lateral) wobbles - at least enough to make your bike rideable after a minor prang. This key from Park Tool covers the three most popular nipple sizes. It's made of tough steel and is nickel plated to stand the test of time. While many multi tools come with some sort of spoke key, you can't beat the dedicated tool. This deserves a space in the corner of your pack - you never know when you might depend on it." 

Park Tool Reference: SW-7.2

Weight: 50.4g / 1.8 oz