![Premier Alloy Wheel Ultra-Power Impact Socket 1/2"Sq Drive 21mm [SX03921]](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/SX03921.V2_DFC1274253__28700.1720588753.webp)
![Premier Alloy Wheel Ultra-Power Impact Socket 1/2"Sq Drive 21mm [SX03921] - Image 2](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/SX03921.V2_STRAIGHT_DFC1274256__37738.1720588753.webp)
![Premier Alloy Wheel Ultra-Power Impact Socket 1/2"Sq Drive 21mm [SX03921] - Image 3](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/SX03921.V2_ACT_FITTING_ON_TOOL_DFC1274257__71443.1720588763.webp)
![Premier Alloy Wheel Ultra-Power Impact Socket 1/2"Sq Drive 21mm [SX03921] - Image 4](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/SX03921.V2_ACT_IN_USE_DFC1274261__84414.1720588764.webp)
![Premier Alloy Wheel Ultra-Power Impact Socket 1/2"Sq Drive 21mm [SX03921] - Image 5](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/SX03921.V2_ACT_FITTING_ON_WHEEL_NUT_DFC1274259__29687.1720588765.webp)
![Premier Alloy Wheel Ultra-Power Impact Socket 1/2"Sq Drive 21mm [SX03921] - Image 6](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/SX03921.V2_ACT_IN_USE_PIC2_DFC1274264__64893.1720588766.webp)
![Premier Alloy Wheel Ultra-Power Impact Socket 1/2"Sq Drive 21mm [SX03921] - Image 7](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/SX03921.V2_ACT_SPECIFICATIONS_DFC1274265__12829.1720588767.webp)
Description
• Five times stronger than the conventional design and tested to 500Nm.
• Innovative design features a protective metal colour-coded ring that prevents the socket wall spreading.
• 6pt Socket is sleeved and has an insert to prevent damage to alloy wheels and nuts.
• Lifetime guarantee*.
![Premier Alloy Wheel Ultra-Power Impact Socket 1/2"Sq Drive 21mm [SX03921]](https://www.toolpointsolutions.com/wp-content/uploads/2026/09/SX03921.V2_DFC1274253__28700.1720588753-324x324.webp)