Easy
Less than 15 minutes
This is an original Black and Decker part manufactured for use with trimmers. This plastic guard assembly mounts near the trimmer head, and is used to protect from clipping debris. The guard assembly includes the blade that trims excess trimmer line, the guard assembly is sold individually.
Guard Assembly N525210
OEM part for: Black and Decker
Part Number: N525210
$7.34
In Stock
Ships within 1 business day 
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Frequently Purchased Together ?
Compatibility
This part will fit the following 6 machines
Black and Decker
ST7700 13" Automatic Feed Trimmer/Edger View Diagrams & Manuals
ST7700-B3LZ (Type 3) String Trimmer - Fob Inte Power Tool View Diagrams & Manuals
ST7700 (Type 1) 13 String Trimmer Power Tool View Diagrams & Manuals
ST7700 (Type 2) 13 String Trimmer Power Tool View Diagrams & Manuals
ST7700 (Type 3) 13 String Trimmer Power Tool View Diagrams & Manuals
ST7700 (Type 4) 13 String Trimmer Power Tool View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Edger Parts
- Trimmer Parts
This part replaces obsolete part #: 90592073, 90503995
Customer Part Reviews ?
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Easy ordering process. Reasonable price. Arrived quickly.
Great service.
Guest -
July 10, 2023
Verified Purchase
Woman in a mission
I used the cross reference on the website and received the correct part. It came quickly and I was able to install myself!
Guest -
September 22, 2022
Verified Purchase
Easy repair
My weed wicker is as good as new. Who knew I, a 70 year old female, could just change broken and missing parts easily and cheaply and not have to buy a whole new tool!!!!😎
Guest -
August 24, 2020
Verified Purchase
Perfect fit
The parts I ordered were for an older electric trimmer. They fit properly, were delivered in a reasonable amount of time & saved me from buying a new trimmer. I will definitely use erplacementparts for future repairs
Donald -
June 5, 2020
Verified Purchase
Exact part I needed
Just what I needed, great service, reasonably priced and fit perfectly. What more could I ask for?
Ronald -
October 4, 2019
Verified Purchase
Best service ever!
Perfect part . Nobody else had one Right after it arrived on time, I found out that my machine wouldn't work, so I didn't need the part. The man on the phone gave me the refund. I printed the free label, and took it to the post office. So Easy. Hard to believe in such great service. I will always use eReplacement and be sure my machine works first.
Guest -
May 14, 2019
Verified Purchase
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Questions & Answers ?
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Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
Guard broken
ANTON - June 24, 2016
👍 4 of 4 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Removed old the guard and replaced it with the new guard. Needed to remove one screw that holds guard in place. Quick and easy.
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Guard assembly fell off
Judith - June 30, 2020
Tool Type
Grass Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Screwed the new guard assembly on
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trimmer guard broken
Richard - March 15, 2019
Tool Type
Grass Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, allen wrench
Parts Used
remove 2bolts remove old guard. attach new guard tighten bolts with allen wrench. 2 minutes tops to replace.
only issue is that when a part is ordered, new screws would have been included with the new guard.
only issue is that when a part is ordered, new screws would have been included with the new guard.
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Guard assembly completely broken off trimmer.
Katrina - June 27, 2018
Tool Type
Grass Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Put new guard on, tightened screw.
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Original shield cracked
Alicia - May 22, 2016
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
It was easy and the shield was much better quality than the original. So thanks. Back making noise to irritate neighbors. Glad to know that you are there. Snapped right on and screwed it in place.
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Our product descriptions are a combination of data sourced directly from the manufacturers who made your product as well as content researched and curated by our content & customer service teams. This content is edited and reviewed internally before being made public to customers.
Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.
