---
product_id: 662481132
title: "OnGuard RockSolid U-Lock – Angle Grinder Resistant 14mm Hardened Steel Bike Lock with X4P Quad Locking Mechanism, Lightweight Anti-Theft Design, Includes 5 Keys & Theft Protection, 3.5” x 6.9”"
brand: "onguard"
price: "₱28452"
currency: PHP
in_stock: false
reviews_count: 13
category: "Onguard"
url: https://www.desertcart.ph/products/662481132-onguard-rocksolid-u-lock-angle-grinder-resistant-14mm-hardened-steel
store_origin: PH
region: Philippines
---

# 14mm hardened steel shackle Angle grinder resistant RockSolid coating X4P quad locking mechanism OnGuard RockSolid U-Lock – Angle Grinder Resistant 14mm Hardened Steel Bike Lock with X4P Quad Locking Mechanism, Lightweight Anti-Theft Design, Includes 5 Keys & Theft Protection, 3.5” x 6.9”

**Brand:** onguard
**Price:** ₱28452
**Availability:** ❌ Out of Stock

## Summary

> 🔐 Lock in your ride’s safety with RockSolid confidence — because your bike deserves elite protection.

## Quick Answers

- **What is this?** OnGuard RockSolid U-Lock – Angle Grinder Resistant 14mm Hardened Steel Bike Lock with X4P Quad Locking Mechanism, Lightweight Anti-Theft Design, Includes 5 Keys & Theft Protection, 3.5” x 6.9” by onguard
- **How much does it cost?** ₱28452 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/662481132-onguard-rocksolid-u-lock-angle-grinder-resistant-14mm-hardened-steel)

## Best For

- onguard enthusiasts

## Why This Product

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

## Key Features

- • **Quad-Point Security:** X4P locking system secures from four angles, blocking pulling, jacking, and prying attempts.
- • **Ready for Every Ride:** Comes with 5 keys and a sleek U-shape design, perfect for cyclists, commuters, and powersport enthusiasts.
- • **Peace of Mind Protection:** Includes up to $5001 bike theft coverage with registration, elevating your security confidence.
- • **Unmatched Cut Resistance:** Engineered with proprietary RockSolid coating to withstand angle grinder attacks in urban hotspots.
- • **Heavy-Duty Yet Lightweight:** Robust 14mm hardened steel shackle at just 3 lbs for ultimate portability without compromise.

## Overview

The OnGuard RockSolid U-Lock is a premium 14mm hardened steel bike lock featuring an angle grinder resistant coating and a high-security X4P quad locking mechanism. Weighing only 3 lbs, it balances portability with heavy-duty protection. Designed for cyclists and powersport users, it includes 5 keys and offers up to $5001 theft protection with registration, making it a top-tier choice for urban security.

## Description

The OnGuard RockSolid U-Lock provides unbeatable security for your bicycle, motorcycle, or powersport vehicle. With a proprietary coating that resists angle grinder attacks, this lock is designed to withstand the most common methods of theft. Featuring a 14mm shackle and X4P Quattro Bolt locking mechanism, it secures at four points to maximize protection against pulling, jacking, and prying. Despite its robust build, it weighs only 3 lbs, making it easy to carry without sacrificing security. The lock comes with five keys and an Anti-Theft Protection for bicycles and powersport vehicles with proper registration and qualification. With OnGuard RockSolid, you can lock up with confidence knowing your vehicle is protected by top-tier technology.

Review: Great Lock - The Length is long enough for most places I would lock a bike up to. The lock is very secure. The lock is very Durable. It is well worth the money.
Review: Heavy duty well built - Very solid lock. I watched a YouTube review of these u-locks and this one took multiple grinding discs and still did not cut all the way through in 5 minutes. No luck is foolproof. But I think this one is very good and will slow a thief down. I use multiple locks on my e-bike so that they'll go to a softer Target. Highly recommend this product.. and you get five spare keys why you would need five I have no idea but it was nice.

## Features

- Angle Grinder Resistant Design: Engineered with OnGuard’s proprietary RockSolid coating that resists angle grinder attacks, offering elite-level protection in high-risk urban environments for cyclists and commuters.
- X4P Quad Locking Mechanism: Features a high-security four-point locking system that secures the shackle from every direction, providing superior resistance to pulling, jacking, and prying attempts by thieves.
- Heavy-Duty 14mm Shackle: Built from hardened steel, this U-lock delivers outstanding strength and durability, effectively deterring cutting, sawing, or twisting attacks while maintaining a manageable weight.
- Lightweight Yet Tough: Weighing only 3 lbs, the OnGuard RockSolid U-Lock strikes the perfect balance between robust security and portability, making it easy to carry on your bike or in a backpack.
- Anti-Theft Protection Program: Includes up to $5001 bicycle and $1251 powersport coverage (with registration, where available) for extra peace of mind and confidence in OnGuard’s trusted lock technology.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DG73D13P |
| Best Sellers Rank | #40,811 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #27 in Bike U-Locks |
| Brand | ONGUARD |
| Color | Black |
| Control Method | Touch |
| Controller Type | Hand Control |
| Customer Reviews | 4.7 4.7 out of 5 stars (93) |
| Date First Available | September 5, 2024 |
| Finish Type | Natural |
| Included Components | keys |
| Item Weight | 3 pounds |
| Item dimensions L x W x H | 0.55 x 3.5 x 6.88 inches |
| Item model number | 8590 |
| Lock Type | Pin Tumbler |
| Manufacturer | OnGuard |
| Manufacturer Part Number | 8590 |
| Material | Alloy Steel |
| Model Name | RockSolid |
| Number of Pieces | 1 |
| Product Dimensions | 0.55 x 3.5 x 6.88 inches |
| Recommended Uses For Product | Cycling, Motorcycle, Powersports |
| Shape | U Shape |
| Special Feature | Cut Resistant |
| Special Features | Cut Resistant |
| Style | U-lock |
| UPC | 768661285906 |

## Product Details

- **Brand:** ONGUARD
- **Item dimensions L x W x H:** 0.55 x 3.5 x 6.88 inches
- **Lock Type:** Pin Tumbler
- **Material:** Alloy Steel
- **Special Feature:** Cut Resistant

## Images

![OnGuard RockSolid U-Lock – Angle Grinder Resistant 14mm Hardened Steel Bike Lock with X4P Quad Locking Mechanism, Lightweight Anti-Theft Design, Includes 5 Keys & Theft Protection, 3.5” x 6.9” - Image 1](https://m.media-amazon.com/images/I/51Xwc0MulVL.jpg)
![OnGuard RockSolid U-Lock – Angle Grinder Resistant 14mm Hardened Steel Bike Lock with X4P Quad Locking Mechanism, Lightweight Anti-Theft Design, Includes 5 Keys & Theft Protection, 3.5” x 6.9” - Image 2](https://m.media-amazon.com/images/I/51ly20gEyhL.jpg)
![OnGuard RockSolid U-Lock – Angle Grinder Resistant 14mm Hardened Steel Bike Lock with X4P Quad Locking Mechanism, Lightweight Anti-Theft Design, Includes 5 Keys & Theft Protection, 3.5” x 6.9” - Image 3](https://m.media-amazon.com/images/I/61vGDwfR7QL.jpg)
![OnGuard RockSolid U-Lock – Angle Grinder Resistant 14mm Hardened Steel Bike Lock with X4P Quad Locking Mechanism, Lightweight Anti-Theft Design, Includes 5 Keys & Theft Protection, 3.5” x 6.9” - Image 4](https://m.media-amazon.com/images/I/71-bvuQWj5L.jpg)
![OnGuard RockSolid U-Lock – Angle Grinder Resistant 14mm Hardened Steel Bike Lock with X4P Quad Locking Mechanism, Lightweight Anti-Theft Design, Includes 5 Keys & Theft Protection, 3.5” x 6.9” - Image 5](https://m.media-amazon.com/images/I/715SdFGd+HL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Lock
*by A***S on September 28, 2025*

The Length is long enough for most places I would lock a bike up to. The lock is very secure. The lock is very Durable. It is well worth the money.

### ⭐⭐⭐⭐⭐ Heavy duty well built
*by B***Y on January 4, 2026*

Very solid lock. I watched a YouTube review of these u-locks and this one took multiple grinding discs and still did not cut all the way through in 5 minutes. No luck is foolproof. But I think this one is very good and will slow a thief down. I use multiple locks on my e-bike so that they'll go to a softer Target. Highly recommend this product.. and you get five spare keys why you would need five I have no idea but it was nice.

### ⭐⭐⭐⭐ Great lock but doesn't fit 18 or 20 mm chains
*by A***O on October 14, 2025*

A good lock but had to do a return as the dimensions weren't correct and didn't fit the chain I had bought with it

## Frequently Bought Together

- OnGuard RockSolid U-Lock – Angle Grinder Resistant (3.5” x 6.9”) for Bicycle, Motorcycle, Powersport – 14mm Shackle, X4P Locking Mechanism, Lightweight, 5 Keys Included, Anti-Theft Protection
- Kryptonite Keeper 712 Bike Chain Lock, 4 Feet Long Heavy Duty Anti-Theft Bicycle Chain Lock with Keys for Bike, Motorcycle, Scooter, Bicycle, Door, Gate, Fence,Black

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*Product available on Desertcart Philippines*
*Store origin: PH*
*Last updated: 2026-01-26*