---
product_id: 14091925
title: "Master Lock U-Lock Keyed Bike Lock, 7-1/4-inch Anti-Theft Device, 8320D"
brand: "master lock"
price: "€ 42.93"
currency: EUR
in_stock: true
reviews_count: 13
category: "Master Lock"
url: https://www.desertcart.it/products/14091925-master-lock-u-lock-keyed-bike-lock-7-1-4
store_origin: IT
region: Italy
---

# Disc keyed lock with pick resistance 7.25-inch wide U-lock body Hardened steel resists cutting & prying Master Lock U-Lock Keyed Bike Lock, 7-1/4-inch Anti-Theft Device, 8320D

**Brand:** master lock
**Price:** € 42.93
**Availability:** ✅ In Stock

## Summary

> 🔐 Lock in your peace of mind — because your bike deserves the best.

## Quick Answers

- **What is this?** Master Lock U-Lock Keyed Bike Lock, 7-1/4-inch Anti-Theft Device, 8320D by master lock
- **How much does it cost?** € 42.93 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/14091925-master-lock-u-lock-keyed-bike-lock-7-1-4)

## Best For

- master lock enthusiasts

## Why This Product

- Trusted master lock brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Ready for Action:** Includes mounting bracket and two keys for seamless on-the-go security.
- • **Scratch-Free Protection:** Vinyl coating safeguards your bike’s frame from everyday wear and tear.
- • **Unmatched Urban Security:** Heavy-duty hardened steel body defends your bike in the busiest city streets.
- • **Precision Disc Keyed Lock:** Advanced pick-resistant mechanism ensures only you hold the keys to your ride.
- • **Versatile Locking Clearance:** 7-1/4 inch wide body with 9 inch shackle fits most racks and fixed objects effortlessly.

## Overview

The Master Lock 8320D is a premium 7-1/4 inch wide U-lock designed for serious bike security. Featuring a hardened steel body and double locking shackle, it resists cutting, sawing, and prying. Its disc keyed locking mechanism offers strong pick resistance, while the vinyl coating protects your bike’s frame from scratches. Complete with a mounting bracket and two keys, this lock is perfect for urban cyclists seeking reliable, everyday anti-theft protection.

## Description

Secure your bicycle with the Master Lock 8320D heavy duty bike U-lock, a keyed bicycle lock designed for everyday outdoor security. Built with a hardened steel body, this anti-theft bike lock helps resist cutting, sawing and prying, while the double locking shackle adds pry resistance for a secure hold. The disc keyed locking mechanism provides pick resistance, and the protective vinyl coating helps prevent scratches on bike frames during regular use. With a 7-1/4 in. wide lock body and 9 in. shackle length, this bicycle U-lock offers practical locking clearance for securing your bike to racks and fixed objects. Includes one U-lock, mounting carrier bracket and two keys for convenient bike security at home, work, school or on the go.

Review: Strong, Secure, and Useful for More Than Just Bikes - I originally chose this U-lock for a bicycle, but I ended up using it to secure the door on our outdoor shed, and it has worked extremely well. The lock feels very sturdy and well made. It’s easy to lock and unlock with the included keys, and the solid construction gives me confidence that it’s helping keep our belongings secure. I also appreciate that the protective coating helps prevent scratches. Even though it’s marketed as a bike lock, I found it to be a versatile security lock that works well for other outdoor applications too. If you need a dependable lock for a bicycle, shed, gate, or similar item, this is a great option. Overall, it’s a quality Master Lock product that’s simple to use, durable, and provides excellent peace of mind.
Review: A good deal; I'd buy them again! - The deal I had on desertcart was hard to pass on, and I've been looking at this product for a while. Point, click, wait... they arrived in a sturdy box, in impeccable condition. One word of warning... the key releases the bar completely from the horseshoe section, so it will drop off once it is disengaged. No regrets; I'd buy them again

## Features

- HEAVY DUTY BIKE U-LOCK: Master Lock 8320D keyed bike lock helps secure bicycles in busy urban areas; Ideal as a bicycle U-lock and anti-theft bike lock for everyday outdoor security
- HARDENED STEEL BODY: Heavy duty bike lock is built with a hardened steel body to help resist cutting, sawing and prying for dependable bicycle security
- DISC KEYED LOCKING: Disc keyed locking mechanism provides strong pick resistance, while the double locking shackle adds pry resistance for a secure hold
- PROTECTIVE VINYL COATING: Vinyl-coated U-lock helps prevent scratches on bike frames and equipment during regular outdoor use
- BIKE LOCK SET: Includes one Master Lock 8320D U-lock with key, mounting carrier bracket and two keys; Lock body is 7-1/4 in. wide with a 9 in. shackle length

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00QJRKSTQ |
| Additional Features | Unlock keys |
| Best Sellers Rank | #381 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #2 in Bike U-Locks #195 in Hardware |
| Brand | Master Lock |
| Brand Name | Master Lock |
| Color | Black |
| Connectivity Protocol | Wi-Fi |
| Control Method | Touch |
| Controller Type | Hand Control |
| Customer Reviews | 4.5 out of 5 stars 5,060 Reviews |
| Finish Types | Polished |
| Global Trade Identification Number | 00071649205255 |
| Included Components | Lock |
| Item Dimensions | 9.8 x 7.42 x 1.35 inches |
| Item Highlight | Keyed Bike Lock For Bicycles and Outdoor Equipment Provides Anti-Theft Security, Hardened Steel Body Resists Cutting, Prying |
| Item dimensions L x W x H | 9.8 x 7.42 x 1.35 inches |
| Lock Type | Key Lock |
| Manufacturer | Master Lock |
| Manufacturer Part Number | 8320D |
| Material | Alloy Steel , Vinyl |
| Material Type | Alloy Steel, Vinyl |
| Model Name | 8320D |
| Model Number | 8320D |
| Number of Items | 1 |
| Number of Packs | 1 |
| Number of Pieces | 1 |
| Recommended Uses For Product | Bike |
| Shape | U Shape |
| Special Feature | Unlock keys |
| Style Name | No Cable |
| UPC | 071649205255 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Master Lock
- **Item dimensions L x W x H:** 9.8 x 7.42 x 1.35 inches
- **Lock Type:** Key Lock
- **Material:** Alloy Steel, Vinyl
- **Special Feature:** Unlock keys

## Images

![Master Lock U-Lock Keyed Bike Lock, 7-1/4-inch Anti-Theft Device, 8320D - Image 1](https://m.media-amazon.com/images/I/71gpILyau4L.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Strong, Secure, and Useful for More Than Just Bikes
*by J***R on June 26, 2026*

I originally chose this U-lock for a bicycle, but I ended up using it to secure the door on our outdoor shed, and it has worked extremely well. The lock feels very sturdy and well made. It’s easy to lock and unlock with the included keys, and the solid construction gives me confidence that it’s helping keep our belongings secure. I also appreciate that the protective coating helps prevent scratches. Even though it’s marketed as a bike lock, I found it to be a versatile security lock that works well for other outdoor applications too. If you need a dependable lock for a bicycle, shed, gate, or similar item, this is a great option. Overall, it’s a quality Master Lock product that’s simple to use, durable, and provides excellent peace of mind.

### ⭐⭐⭐⭐⭐ A good deal; I'd buy them again!
*by O***G on July 15, 2026*

The deal I had on Amazon was hard to pass on, and I've been looking at this product for a while. Point, click, wait... they arrived in a sturdy box, in impeccable condition. One word of warning... the key releases the bar completely from the horseshoe section, so it will drop off once it is disengaged. No regrets; I'd buy them again

### ⭐⭐⭐⭐⭐ Ole skool Master bike lock outstanding
*by R***D on July 23, 2026*

The best bike lock on the market not only secure but turn thieves away instantly on sight

## Frequently Bought Together

- Master Lock Black Bike Lock with Key, Standard Size U-Lock for Bicycles and Other Outdoor Equipment, Anti-Theft Lock for Bikes, 8320D
- Schwinn Thrasher Bike Helmet for Adult Men Women Age 14+ with Suggested Fit 58-62cm, Multi-Mode Rear LED Light or No Light Option, Lightweight with Adjustable Side and Chin Strap, Bike Accessories
- Master Lock Cable Lock, Set Your Own Combination Bike Lock, 6 ft. Long, Black, 8122D

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**Shop now:** [https://www.desertcart.it/products/14091925-master-lock-u-lock-keyed-bike-lock-7-1-4](https://www.desertcart.it/products/14091925-master-lock-u-lock-keyed-bike-lock-7-1-4)

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-09-26*