Master Lock Heavy Duty Shrouded Outdoor Disc lock 2-3/4-in Wide x 5/8-in Shackle ( 3 -Pack )

Name: Master Lock Heavy Duty Shrouded Outdoor Disc lock 2-3/4-in Wide x 5/8-in Shackle ( 3 -Pack )
Brand: Master Lock
SKU: 3453958
Price: 45.98 USD
Availability: InStock
Rating: 4.1 (246 reviews)

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4.1

246

Magnum® - #1 padlock choice of professionals
Shrouded tough cut™ shackle protects against bolt cutter attacks
Same key opens all locks (two keys included)

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Unavailable

Shipping

Wed, Oct 14

274 available

Delivery

Thu, Oct 15

275 available

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The Master Lock Magnum® M40XT discus padlocks with keys feature a 2-3/4 in. (70 mm) wide stainless steel body for maximum strength, reliability and corrosion resistance. The fully shrouded design minimizes shackle exposure and protects against bolt cutter attacks. The 3/8 in. (10 mm) diameter octagonal shackle is 5/8 in. (16 mm) long and made of Tough-Cut™ boron-carbide, 50% harder than hardened steel, offering maximum resistance to cutting and sawing. The 4-pin cylinder prevents picking and the dual locking ball bearings provide maximum resistance against prying and hammering. The covered keyway offers maximum weather protection, and reinforced body bumper protects against scratches. The lifetime guarantee provides peace of mind from a brand you know and can trust.

Magnum® - #1 padlock choice of professionals
Shrouded tough cut™ shackle protects against bolt cutter attacks
Same key opens all locks (two keys included)
2-3/4 in (70 mm) wide lock body; 3/8 in (10 mm) diameter shackle with 5/8 in (16 mm) length, 1-1/32 in (28 mm) width
Outdoor lock; heavy duty discus padlock with key is best used for outdoor storage and fences, self-storage units and lockers and more
Key lock features tough cut™ octagonal boron-carbide shackle is 50% harder than hardened steel; fully shrouded design minimizes shackle exposure and protects against bolt cutter attacks
4-Pin cylinder for increased pick resistance; covered keyway for maximum weather protection

General
Lock Material	Stainless steel	Series Name	Heavy Duty Shrouded Outdoor
Dial Count	N/A (keyed lock)	Contractor Grade	Yes
Combination Type	N/A (not combination)	Lock Type	Disc lock
Keying Type	Keyed alike	Number of Pins	4
Package Quantity	3	Color/Finish Family	Silver
Use Location	Outdoor	Manufacturer Color/Finish	Silver

Dimensions
Width Measurement	2-3/4-in	Shackle Diameter (Inches)	0.375
Height (Inches)	4.80	Shackle Height	5/8-in
Thickness (Inches)	1.40	Shackle Width (Inches)	1.05

Features
Shrouded Shackle	Yes	Keys Included	Yes
Adjustable	No	Rust Protection	Yes
Weatherproof	Yes

Compatibility
For Use with Luggage	No	Wi-Fi Compatibility	No
For Use with Bikes	No	App Compatibility	No
For Use with Laptops	No	Bluetooth Compatibility	No
Works with iOS	No	Smart Compatible	No
Works with Android	No

Certifications
CA Residents: Prop 65 Warning(s)	No	TSA Accepted	No

Warranty
Warranty	Lifetime

Miscellaneous
UNSPSC	46171500

Review

4.1 out of 5

246 Reviews

79% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

Customers overwhelmingly praise the keyed-alike design, calling it convenient for managing multiple secured spaces with a single key. Most highlight robust security, sturdy construction, and weather-resistant covers that protect against moisture and debris. The disc-shaped design and small keyhole opening effectively resist tampering. However, some report operational issues in freezing or wet conditions, with water entering locks and causing rust or jamming. A notable group expresses frustration over receiving only two keys for three locks. Despite these drawbacks, most customers consider the locks reliable and worthwhile for their security needs.

Customer review summary generated by AI, including incentivized reviews.

246 Customer Reviews

Sort By

Lovks

Locks work great

AndySeptember 24, 2026
Verified Purchaser

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Awesome protection

Would Recommend

Got these for my moving pod to keep it secure during our move

Rdh22501September 14, 2026
Verified Purchaser

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More secure than other locks.

Would Recommend

Great price and great product.

Q manJune 20, 2026
Verified Purchaser

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Good product

Would Recommend

I had one already for several years and it unlocks so smoothly unlike the other common brand. I needed three to match key. I do wish it came with three keys. It’s a good lock.

I RivJune 18, 2026
Verified Purchaser

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Shrouded Keyed Padlocks are a necessity for me.

Would Recommend

They're perfect for locking all my storage sheds! Highly recommend these as a way to keep sheds safe. Surprised that there are only 2 keys for 3 locks. But I suppose that's the norm these days. I'll make extra keys myself I guess.

countrymouserJune 10, 2026
Verified PurchaserVerified Pro

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COMPARE PRODUCTS

		Name	Current Item Master LockHeavy Duty Shrouded Outdoor Disc lock 2-3/4-in Wide x 5/8-in Shackle ( 3 -Pack )
		Ratings	246
		Rust Protection
		Weatherproof
		Keys Included
Master LockStainless Steel Outdoor Keyed Padlock, 1-3/4-in Wide x 2-in Shackle ( 3 -Pack )	Master LockPro Pack Shrouded Outdoor Disc lock 2-3/4-in Wide x 5/8-in Shackle ( 6 -Pack )	Master LockPro Pack Outdoor Keyed Padlock, 1-3/4-in Wide x 1-1/2-in Shackle ( 6 -Pack )	Master LockHeavy Duty Outdoor Keyed Padlock, 2-in Wide x 1-1/2-in Shackle ( 4 -Pack )	Master LockHeavy Duty Outdoor Keyed Padlock, 1-7/8-in Wide x 1-1/2-in Shackle ( 4 -Pack )	Master LockHeavy Duty Outdoor Resettable Combination Padlock, 2-in Wide x 1-1/2-in Shackle ( 3 -Pack )	Master LockStainless Steel Outdoor Keyed Padlock, 2-in Wide x 2-1/2-in Shackle ( 2 -Pack )	Master LockHeavy Duty Outdoor Resettable Combination Padlock, 2-in Wide x 2-1/2-in Shackle ( 3 -Pack )	BrinksHeavy Duty Keyed Padlock, 2-13/16-in Wide x 1/2-in Shackle ( 4 -Pack )
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