

🛠️ Elevate your toolkit with precision and power — don’t get left behind!
The Proto Stanley J7121 1/2-Inch Square Extension with 7/16-Inch Hex is a compact, forged steel tool accessory designed for durability and precision. Featuring a ball detent for secure fastening and size stamping for easy identification, this USA-made extension is ideal for professionals seeking reliable, high-quality tool performance.



| Manufacturer | Stanley Proto | 
| Part Number | J7121 | 
| Product Dimensions | 2.54 x 2.54 x 2.54 cm; 68.04 g | 
| Item model number | J7121 | 
| Size | Оnе Расk | 
| Colour | Multi | 
| Style | Classic | 
| Finish | Brushed | 
| Material | Alloy Steel | 
| Pattern | Solid | 
| Shape | Rectangular | 
| Power Source | ac | 
| Item Package Quantity | 1 | 
| Number of Pieces | 1 | 
| Head Style | Fixed Square, Hex | 
| Number of handles | 1 | 
| Measurement System | Inch | 
| Compatible fastener range | 0.5 inches | 
| Included Components | 1/2" Square Extension 7/16" Hex | 
| Batteries included? | No | 
| Batteries Required? | No | 
| Item Weight | 68 g | 
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