2 Pieces Finger Gripper Strengthener Hand Grip Exerciser Ring red Indicators there are two small holes

there are two small holes in the inner center for screw mounting

Effectively protects valve against exposure to dirt and dust

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2 Pieces Finger Gripper Strengthener Hand Grip Exerciser Ring red Indicators there are two small holesITEM NAME: 2 Pieces Finger Gripper Strengthener Hand Grip Exerciser Ring red img *{margin: 0; padding: 0;. 2 Pieces Grip Ring. Color: Black red blue bright green yellow. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Great for daily exercise, improves strength, prevents stiffness and relieves joint pain.