

NOTICE:
Out Of Date
New Video for the Gen7 coming soon!
The current installation video is outdated, but can still be viewed. Ignore any reference to the infamous saddle brace. Oct 2024 marked the end of the program for good reasons. A new install video will be released soon that discusses why the saddle brace is no longer needed with the PRO Series. Should you require more information now, please refer to the lower right side of this web page. I appreciate your support and wish you a great ​season. Stand Tall!
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Sincerely,
Robbie Hamilton
Director of Operations
Grass Jacket INC.
DBA Darwin's Grip®
The three most important things to remember when determining your sweet spot.
1
Relaxed Arms
To achieve totally relaxed arms, simply let them dangle by your side. *Notice how the palms of your hands are cupped toward your body. Keeping them cupped and raise the whole arm that you used to hold the factory handle out about 12 inches from your waistline. Then without twisting your hand or arm, make a doughnut hole with your fingers. The "O" you made is where the air is replaced with the DG silicone handle that's already attached to the bar. As you can see, your extended hand has the kung-fu-hammer-fist grip, which is ​​natural and recommended. Adjust the DG bar accordingly to maintain this relaxed posture, allowing for prolonged use with less overall discomfort and/or fatigue.
2
Fully Extended Arms
While holding the installed DG attached to the trimmer with a firm hammer fist grip, the trimmer's business end should be resting on top of the ground. Your arms should be relaxed and fully extended. In this natural position, the trigger arm is at rest. Additionally, keeping your arms relaxed and fully extended will reduce strain and prevent fatigue during extended use. Proper posture also minimizes the risk of injury and allows for more precise trimming. Maintaining relaxed arms and a balanced stance is key.
3
Shoulders Square
Keep your shoulders pointing forward ​as much as possible while holding the DG with one hand, the trigger with the other, and hovering ​your new whip just above the ground. Notice: If your DG arm crosses in front of your center of mass, adjustments will be needed. Notice if your shoulders are square or slightly cantered? In order to square off your shoulders, you may need to adjust the DG vise to the 9 or 10 o'clock on the trimmer shaft. In general, the more natural the position, the more comfortable it will be.
