When your work depends on lifting heavy partnered with fragile materials, there's no room for error. The right tools aren't just about getting the job done - they're about keeping people safe. At GGR Glass, we proudly supply Wood’s Powr-Grip products because we believe safety and reliability should never be compromised.
But don’t just take our word for it - watch the proof in this comparison video, where Wood’s Powr-Grip hand cups go head-to-head with other brands on the market. The difference is clear.
The Test: Side-by-Side Under Ideal Conditions
Each vacuum cup was tested to the point of failure to determine its actual load capacity and safety factor - the margin between the rated load and the point at which the tool gives way. Here’s what we found:
Wood’s Powr-Grip Model N4000
- Rated Capacity: 56.7 kg (125 lbs)
- Tested Capacity: 229.1 kg (505 lbs)
- Safety Factor: 4.0 to 1
- Result: No slippage
Wood’s Powr-Grip Model N4950
- Rated Capacity: 56.7 kg (125 lbs)
- Tested Capacity: 223.2 kg (492 lbs)
- Safety Factor: 3.9 to 1
- Result: No slippage
Now compare that to the competition...
Other Brands: The Safety Factor Falls Short
| Brand | Rated Capacity | Tested Capacity | Safety Factor | Slippage in Video |
|---|---|---|---|---|
| Kobalt | 109.8 kg (242 lbs) | 117.9 kg (260 lbs) | 1.0 to 1 | Yes |
| ZUOS | 79.8 kg (176 lbs) | 127.6 kg (281 lbs) | 1.6 to 1 | Starts slipping |
| XIIW | 199.6 kg (440 lbs) | 101.5 kg (223 lbs) | 0.5 to 1 | Yes |
| Q-Cup | 120.2 kg (265 lbs) | 113.4 kg (250 lbs) | 0.9 to 1 | Yes |
| Omni Cubed | 56.7 kg (125 lbs) | 56.7 kg (125 lbs) | 1.0 to 1 | Yes |
| Vevor | 99.8 kg (220 lbs) | 78.9 kg (174 lbs) | 0.8 to 1 | Yes |
| Diarex | 68 kg (150 lbs) | 154.2 kg (340 lbs) | 2.3 to 1 | - |
| Weha | 158.8 kg (350 lbs) | 140.6 kg (310 lbs) | 0.9 to 1 | - |
Why Safety Factor Matters
Think of the safety factor as your margin for error. A cup with a 4.0 to 1 safety factor can hold four times its rated load under perfect conditions. If something unexpected happens on-site, that buffer could be the difference between a clean lift and a costly (or dangerous) failure.
With some brands showing a safety factor as low as 0.5 to 1, it’s clear they’re cutting corners - not just on paper, but potentially on your site.
Don’t Take Risks with Your Reputation or Safety
If these brands are exaggerating their load ratings, what else might they be compromising?
At GGR Glass, we only stock what we’d trust ourselves. Wood’s Powr-Grip hand suction cups are engineered in the USA, tested rigorously, and used by professionals worldwide. When your job demands performance you can rely on, there’s only one name to trust.
Choose the Original. Choose Safety. Choose Wood’s Powr-Grip.
Explore our full range of Wood’s Powr-Grip suction lifters today, or get in touch with our team for expert advice.