Gray Tools
Gray Tools MB12-I 12-piece metric open-end wrench set 8–17 mm 1000 V
Twelve insulated open-end wrenches covering 8 mm to 17 mm, each tested to ASTM F1505 with dual-colour 1000 V insulation for live-line safety
- 12-piece set covers metric sizes 8 mm to 17 mm
- Double-layer insulation protects against shock up to 1000 V
- Yellow safety layer reveals damage at a glance
- Tested to ASTM F1505 standard for live-line work
- Individually insulated wrenches ensure reliable electrical protection
12-piece metric open-end set
The Gray Tools MB12-I set contains 12 open-end wrenches covering metric sizes from 8 mm to 17 mm. Each wrench is individually insulated and tested to ASTM F1505 standards for electrical safety. The kit is rated for live work up to 1000 V, making it suitable for qualified electricians and hybrid-vehicle technicians. It arrives new in manufacturer packaging.
Dual-layer insulation under load
The wrenches feature an orange outer insulation layer over a yellow inner layer that acts as a visual safety indicator. If the orange layer is damaged and the yellow layer becomes visible, the tool must be removed from service. This construction maintains dielectric integrity during sustained contact with energised components. The set contains no ratcheting mechanism, so torque is applied manually in the traditional open-end fashion.
California Proposition 65 notice
This product contains a chemical known to the State of California to cause cancer and birth defects or other reproductive harm, as required by Proposition 65. The warning applies to the materials used in the insulation or coating and does not indicate a functional defect. Users should follow standard hygiene practices such as washing hands after use. The wrenches are hand tools with no power draw, noise or thermal output.
Highlights
- 12-piece set covers metric sizes 8 mm to 17 mm
- Double-layer insulation protects against shock up to 1000 V
- Yellow safety layer reveals damage at a glance
- Tested to ASTM F1505 standard for live-line work
- Individually insulated wrenches ensure reliable electrical protection
Specifications
| Brand | GRAY TOOLS |
|---|
Questions about this item
How much heat or noise do these insulated wrenches produce during all-day use?
As hand tools they generate no heat or noise of their own; any warmth comes only from the fastener or the user’s grip.
What else must I already own for the MB12-I set to work?
You need the metric fasteners — bolts or nuts from 8 mm to 17 mm — that match the twelve open-end sizes in the set.
Will these 1000 V wrenches fit the older imperial bolts I still have in my toolbox?
No, the set covers only metric sizes from 8 mm to 17 mm and will not engage imperial-dimension fasteners.
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