Orbit Voyager II Adjustment Key 55070 - The Home Depot
FULenQnu 11003-RCW-NN ProPlus Rotor Sprinkler Pack of 2 - Walmart.com
Hunter Sprinkler Key - DripWorks
Amazon.com : 2 Pack K-Rain MiniPro K-Key Adjustment Tool, K-Rain P59995 K-Key Adjustment Tool, Replacement Key for Mini Pro and Pro Plus Rotor Sprinklers, Pack of 2 K Rain Keys with Included