| | - | 21mm | Metric | 1/2 in | Standard Socket | 6 point | - | - | - | - | 38 mm | Chrome Vanadium Steel |
|
| | - | 21mm | Metric | 3/8 in | Standard Socket | 12 point | - | - | Sandblasted | - | - | Chrome Vanadium Steel |
|
| Bahco | - | 21mm | Metric | 1/2 in | Deep Socket | 12 point | - | - | Polished | - | 82.6 mm | Alloy Steel |
|
| Expert by Facom | - | 21mm | Metric | 1/2 in | Deep Socket | 12 point | - | 79.0mm | Chrome | - | 79 mm | Chrome Vanadium Steel |
|
| ITL Insulated Tools Ltd | VDE/1000V Approved | 21mm | Metric | 3/8 in | Insulated Standard Socket | 12 point | - | - | - | - | 48 mm | - |
|
| Facom | - | 21mm | Metric | 1/2 in | Spark Plug Socket | 6 point | - | - | Chrome | B.S21A2 | 250 mm | Chrome Vanadium Steel |
|
| Bahco | VDE/1000V Approved | 21mm | Metric | 1/2 in | Insulated Standard Socket | 12 point | - | - | Insulated | - | 50 mm | Alloy Steel |
|
| SAM | VDE/1000V Approved | 21mm | Metric | 3/8 in | Insulated Standard Socket | 6 point | - | - | - | - | 47 mm | - |
|
| STAHLWILLE | - | 21mm | Metric | 1/2 in | Standard Socket | 6 point | - | - | Chrome | - | 42 mm | Steel |
|
| SAM | - | 21mm | Metric | 3/8 in | Spark Plug Socket | 6 point | 26mm | - | - | - | 90 mm | - |
|
| Teng Tools | - | 21mm | Metric | 1/2 in | Standard Socket | 6 point | - | - | - | - | 38 mm | - |
|
| Facom | VDE/1000V Approved | 21mm | Metric | 1/2 in | Insulated Standard Socket | 12 point | - | - | Insulated | S.21AVSE | 52 mm | Steel |
|
| Wera | - | 21mm | Metric | 3/8 in | Standard Socket | 6 point | - | 30.0mm | Chrome Plated | Zyklop 8790 | 30 mm | Chrome Vanadium |
|
| Gedore | - | 21mm | Metric | 1/2 in | Standard Socket | 6 point | - | 18.5mm | Chrome | - | 41.5 mm | Vanadium Steel |
|
| Teng Tools | - | 21mm | Metric | 3/8 in | Deep Socket | 6 point | - | - | - | - | 45.5 mm | - |
|
| Expert by Facom | - | 21mm | Metric | 1/2 in | Standard Socket | 12 point | - | 38.0mm | Chrome | - | 38 mm | Chrome Vanadium Steel |
|
| SAM | - | 21mm | Metric | 3/8 in | Deep Socket | 6 point | - | - | - | - | 63 mm | - |
|
| Teng Tools | - | 21mm | Metric | 1/2 in | Standard Socket | 12 point | - | - | - | - | 38 mm | - |
|
| Facom | - | 21mm | Metric | 3/4 in | Long Socket | 6 point | - | 18mm | Chrome | K.21LA | 90 mm | Chrome Vanadium Steel |
|
| Teng Tools | - | 21mm | Metric | 3/4 | Standard Socket | Hex Bit | - | - | - | - | 50 mm | - |