The design allows you to apply great force directly to the spike without damaging your sprinkler head. The design has been field tested by the inventor for over 15 years. The Offset Design transfers all vibration off to the side of the spike which gives unmatched stability to the sprinkler head "no flopping around".
Rain Bird Sprinkler
How To Adjust Sprinkler Head — Sprinkler Supply Store
ANTIQUE VINTAGE SOLID Brass Sprinkler Head Rain Bird 65PJ 65d PATd $14.99 - PicClick
RAIN BIRD 35ADJTNTB Brass Impact Sprinkler Adjustable Pattern 23' - 50' Spray US $19.90 - PicClick
Rain Bird Polyethylene Drip Irrigation Distrubtion Tubing, 1/2-in x 100-ft
Orbit Pop Up Sprinkler
RETRO HEART SPRINKLER Base &1960'S Rebuilt Rain Bird #30 W/ Timer Great Coverage $69.95 - PicClick
Best Lawn Sprinkler: Oscillating, Rotary, Stationary, or Traveling Types - Epic Gardening
RAIN BIRD VINTAGE Brass Sprinkler Head #30 WS Lawn Farm Garden Steampunk $14.99 - PicClick
NEW YUZUAK JET 35T 2 Clean/Dirty Water Gear Drive Rain Gun Beautiful Coverage! $425.50 - PicClick
SPRINKLER SPIKE & RAIN BIRD BRASS SPRAY HEAD BEAUTIFUL COVERAGE WATCH VIDEO
REBUILT BRASS IMPACT SPRINKLERS