






🔐 Lock in your ride’s safety with Master Lock’s fortress-grade U-Lock!
The Master Lock 8170D is a heavy-duty U-lock designed for serious bike security. Featuring a 6-1/8 inch wide hardened steel body and an 8 inch double-locking shackle, it offers superior resistance to cutting and prying. Weighing just under 2 pounds and including a carrier bracket, it balances portability with impenetrable strength. Ideal for urban and suburban cyclists, it comes with two keys and a limited lifetime warranty, making it a trusted choice for long-term bike protection.

| Brand | Master Lock |
| Special Feature | Heavy Duty |
| Lock Type | Key Lock |
| Item dimensions L x W x H | 9.8 x 7.33 x 1.33 inches |
| Material | Alloy Steel, Rubber |
| Recommended Uses For Product | Bike |
| Style | Lock |
| Color | Black |
| Number of Pieces | 1 |
| Finish Type | Vinyl Coating |
| Included Components | U-lock bike lock, two keys, and a carrier bracket |
| Controller Type | Hand Control |
| Shape | U Shape |
| Item Weight | 2 Pounds |
| Control Method | Touch |
| UPC | 071649222771 |
| Model Name | 8170D |
| Global Trade Identification Number | 00071649222771 |
| Manufacturer | Master Lock |
| Part Number | 8170D |
| Item Weight | 1.96 pounds |
| Product Dimensions | 9.8 x 7.33 x 1.33 inches |
| Item model number | 8170D |
| Is Discontinued By Manufacturer | No |
| Size | 6-1/8 inch U-Lock |
| Finish | Vinyl Coating |
| Item Package Quantity | 1 |
| Special Features | Heavy Duty |
| Batteries Included? | No |
| Batteries Required? | No |
| Warranty Description | Limited Lifetime Warranty |
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