





🔧 Reach further, torque harder, last longer — the extension pros trust!
The TEKTON 1/2 Inch Drive x 3 Inch Impact Extension (SIA21103) is a precision-engineered tool accessory designed to extend your impact driver’s reach into tight or obstructed spaces. Made from heat-treated 6140 Chrome Vanadium steel with a corrosion-resistant manganese phosphate finish, it offers superior strength and durability. Featuring a spring-loaded detent ball and a through-hole locking mechanism, it securely holds sockets in place, preventing drops and ensuring reliable torque transfer for tough fasteners.
| Manufacturer | TEKTON |
| Part Number | SIA21103 |
| Product Dimensions | 7.62 x 2.54 x 2.54 cm; 140.61 g |
| Item model number | SIA21103 |
| Size | 1/2 Inch Drive x 3 Inch |
| Finish | Corrosion-resistant Manganese,Phosphate Finish |
| Material | Chrome Vanadium Steel |
| Item Package Quantity | 1 |
| Number of Pieces | 1 |
| Compatible fastener range | 0.5 inches |
| Included Components | (1) TEKTON 1/2 Inch Drive x 3 Inch Impact Extension | SIA21103 |
| Batteries Required? | No |
| Item Weight | 141 g |