Old version by GripperBot on 2026-09-16 20:32:53 compared to new version by GripperBot on 2026-09-16 20:32:54
| Old Version | New Version | ||
|---|---|---|---|
| 1 | # Bone Crusher | ||
| 2 | |||
| 3 | **Bone Crusher** is a fixed-resistance torsion-spring gripper line that was being compared with Heavy Grips in grip-community discussions by 2009.[^1] Retail listings continue to document models marked from 100 through 350 lb.[^2] | ||
| 4 | |||
| 5 | ## Documented lineup | ||
| 6 | |||
| 7 | | Model marking | | ||
| 8 | |---:| | ||
| 9 | | 100 lb | | ||
| 10 | | 150 lb | | ||
| 11 | | 200 lb | | ||
| 12 | | 250 lb | | ||
| 13 | | 300 lb | | ||
| 14 | | 350 lb | | ||
| 15 | |||
| 16 | The model numbers are advertised resistance labels rather than standardized measurements. As with other mass-produced grippers, spring dimensions, mount depth, spread, and manufacturing variation can make two examples with the same marking close differently. | ||
| 17 | |||
| 18 | ## Comparison with Heavy Grips | ||
| 19 | |||
| 20 | A detailed 2009 GripBoard comparison examined Bone Crusher and Heavy Grips side by side. The author reported several visible differences in the tested examples:[^1] | ||
| 21 | |||
| 22 | - Bone Crusher handle knurling appeared consistent across its levels and was described as sharp. | ||
| 23 | - Its springs were mounted lower and more consistently than the compared Heavy Grips. | ||
| 24 | - The writer found the Bone Crushers harder before seasoning. | ||
| 25 | |||
| 26 | These are observations from a particular comparison set, not proof that every production batch shares the same measurements or closing difficulty. The value of the discussion is that it preserves photographs and contemporary owner observations from when the line was readily available. | ||
| 27 | |||
| 28 | ## Later retail evidence | ||
| 29 | |||
| 30 | Current Eastern European listings use the name **Bone Crusher Heavy Grip** and product code **FI-4125** for the 100, 150, 200, 250, 300, and 350 lb range.[^2][^3] That wording should not be used to assume a corporate connection to the separate Heavy Grips brand. | ||
| 31 | |||
| 32 | The historical Bone Crusher gripper line should also not be confused with the later **Gripzilla Bone Crusher**, which is a model name used by another company. | ||
| 33 | |||
| 34 | ## Preservation | ||
| 35 | |||
| 36 | An authoritative manufacturer history and dated catalog have not yet been located. The strongest surviving record combines contemporary grip-community discussion with later retailer listings. Packaging photographs, early catalogs, or documents identifying the original manufacturer would improve the page. | ||
| 37 | |||
| 38 | [^1]: [GripBoard, Heavygrips and Bonecrushers: The Subtle Differences](https://www.gripboard.com/topic/30950-heavygrips-and-bonecrushers-the-subtle-differences/), 2009. | ||
| 39 | [^2]: [Espander, Bone Crusher Heavy Grip FI-4125](https://espander.com.ua/), retailer listing for 100 through 350 lb models. | ||
| 40 | [^3]: [Rozetka, Bone Crusher Heavy Grip FI-4125](https://rozetka.com.ua/400265784/p400265784/), retailer listing. | ||