Stahlwille Starter metric ring spanners, 10 x 12mm
Available
Stahlwille 27 STARTER is a double ended ring spanner range in seven metric sizes from 10 x 12 to 19 x 22mm, from 150mm to 225mm long. The rings are deep offset at 75°, which reaches angled or hard-to-access areas.
The bi-hex (double hexagon, 12-point) profile carries Stahlwille's AS-Drive (Anti-Slip Drive) form, which transmits high forces to the flats of nuts and bolts without damaging them. The spanners are Chrome Alloy Steel, chrome-plated, and made to ISO 3318. The spanners are forged in a die, hardened and quenched in an oil bath, with a double-T profile for bending strength and a round finish for grip.
Where this product is used
- Metric nuts and bolts from 10 to 22mm across flats
- Confined spaces where a slim ring spanner is needed
- Entry-level ring spanner kits for general maintenance
Features
- Deep offset ring spanner, 75°
- Seven metric sizes from 10 x 12 to 19 x 22mm
- Bi-hex (12-point) profile with AS-Drive anti-slip form
- Chrome Alloy Steel, chrome-plated
- Made to ISO 3318
- Suitable for confined spaces
Key specifications
| Specification | Detail |
|---|---|
| Brand | Stahlwille |
| Product type | Ring Spanner |
| Length | 150 to 225mm |
| Offset | 75° offset |
| Profile | Bi-hex (double hexagon, 12-point) with AS-Drive profile |
| Standard | ISO 3318 |
| Material | Chrome Alloy Steel, chrome-plated |
| Sizes in this range | 7 |
| Order no | 41091012 to 41091922 |
| Weight | 50 to 164 g |
Choosing the right option
The 27 STARTER covers seven common metric size pairs. For a wider metric range with a 75° offset see the Stahlwille 20 Deep Offset Double Ended Ring Spanners, for a straight spanner see the Stahlwille 21 Straight Double Ended Ring Spanners, and for work close to a surface see the Stahlwille 23 CORONA Shallow Offset Double Ended Ring Spanners.
Related Stahlwille products: 20/8 offset ring spanner set (8-piece), 21/7 flat ring spanner set (7-piece), metric combination spanners, metric ratchet ring spanners.
| Option | Part number | SKU |
|---|---|---|
| 10 x 12 | SW27 10X12 - 41091012 | A0103953 |
| 11 x 13 | SW27 11X13 - 41091113 | A0103954 |
| 14 x 16 | SW27 14X16 - 41091416 | A0103955 |
| 14 x 17 | SW27 14X17 - 41091417 | A0103956 |
| 15 x 17 | SW27 15X17 - 41091517 | A0103957 |
| 16 x 18 | SW27 16X18 - 41091618 | A0103958 |
| 19 x 22 | SW27 19X22 - 41091922 | A0103959 |
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Stahlwille 27 Starter (Half Moon) Double Ended Ring Spanners, Metric, 10 x 12 to 19 x 22 mm: 10 x 12
SKU: A0103953 | Model: SW27 10X12 - 41091012
Stahlwille SW27 10 x 12mm: starter double ended ring spanner, 150mm long, 53 g, order number 41091012. Offset: 75° offset.

