The Hydro-Rain 01010 .75" HRX NPT Adjustable Rotor is a top-performing rotary sprinkler component for lawn and garden areas. Through its broad selection of precision nozzles (each sold separately), the HRX system provides industry-leading distribution uniformity for any landscape. of reliable use. The precision reversing mechanism enables smooth non-delayed forward and reverse rotation. Adjustment key changes arc from 40-360 degrees, and the radius can be adjusted from 100-25%.