Old version by GripperBot on 2026-09-16 20:32:12 compared to new version by GripperBot on 2026-09-16 20:32:13
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| 1 | # Vatiz | ||
| 2 | |||
| 3 | **Vatiz** is a retail name found on Rainbow-series torsion-spring hand grippers and an adjustable gripper. Surviving English-language documentation is limited, and the relationship between the Vatiz name, **Rainbow Grip**, and the **Zoeun/Jouen Sports** names used in older discussions is not fully established.[^1][^2] | ||
| 4 | |||
| 5 | ## Rainbow grippers | ||
| 6 | |||
| 7 | Marketplace listings document color-coded Rainbow grippers with advertised kilogram and pound ratings. One example is the blue model advertised at 56 kg [123.5 lb], while other listings document higher levels such as a silver 86 kg [190 lb] model.[^2][^3] | ||
| 8 | |||
| 9 | A 2013 GripBoard post described a **Rainbow Twist** gripper with one revolving handle, anodized handle colors, and a phosphate-coated spring. The writer associated the product with Zoeun Sports and discussed a 108 kg example.[^1] That firsthand description is useful evidence for the design, but its resistance comparison is an owner's observation rather than a standardized measurement. | ||
| 10 | |||
| 11 | Documented collection examples include: | ||
| 12 | |||
| 13 | - Rainbow Ultra in Black, Dark Grey, and Light Grey | ||
| 14 | - Rainbow Ultra Mirror in Black, Dark Grey, and Light Grey | ||
| 15 | |||
| 16 | These names describe surviving specimens and finishes. They do not establish a complete production sequence. | ||
| 17 | |||
| 18 | ## Adjustable gripper | ||
| 19 | |||
| 20 | A separate Vatiz adjustable gripper uses two supplied springs and multiple mounting positions. Owners discussed the design on GripBoard by late 2013, describing a wide adjustment range and moderately sharp knurling.[^4] As with other adjustable grippers, comparisons require the spring and handle positions to be recorded. | ||
| 21 | |||
| 22 | ## Identification and preservation | ||
| 23 | |||
| 24 | Rainbow products continued to appear through international marketplace listings after the earliest community discussions. Those listings are useful for photographs and advertised levels, but seller titles and specifications may change. A dated official catalog, company history, and reliable production chronology have not yet been located. | ||
| 25 | |||
| 26 | For that reason, this page separates documented examples from unverified assumptions about the manufacturer. Additional packaging photographs, dated catalogs, or Korean-language primary sources would materially improve the record. | ||
| 27 | |||
| 28 | [^1]: [GripBoard, New Gripper](https://www.gripboard.com/topic/39785-new-gripper/), 2013 discussion of Rainbow Twist and Zoeun Sports. | ||
| 29 | [^2]: [Amazon, Vatiz Rainbow blue 56 kg listing](https://www.amazon.com/Vatiz-Rainbow-Strength-Strengthener-Exerciser/dp/B07X48TK43). | ||
| 30 | [^3]: [Amazon UAE, Vatiz Rainbow Twist silver 86 kg listing](https://www.amazon.ae/Silver-86KG-190LB-Strengthener-Exerciser/dp/B07X3578FN). | ||
| 31 | [^4]: [GripBoard, Vatiz Adjustable Gripper](https://www.gripboard.com/), discussion indexed December 31, 2013. | ||