Schaefer Single Aluminum Block - 51mm Sheave - 504-05

Schaefer Single Aluminum Block - 51mm Sheave - 504-05

Marsoni

M251S

$66.99

Get it in 3 business days with 1 day shipping. Friday, May 29

Schaefer Single Aluminum Block - 51mm Sheave - 504-05Single Aluminum Block 51mm Sheave Single block with anodized aluminum cheeks. Delrin sheave ensures smooth operation with high safe working load. Swivel head may be locked in place to avoid twist. Specifications: Sheave Dia. 2" (51mm) Thickness 15 16" (24mm) Width 2 1 8" (54mm) Length 4 13 32" (112mm) SWL 1750 lbs. (795kg) Weight 5oz. (142g) Max. Line size 7 16" (11mm)

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I just received these for my son. They are very nice and look sturdy, but he hasn't worn them yet, so I cannot speak to how well they hold up in the wash or when worn. They appear to be the right size and look stretchy, but not the kind of stretchy that feels super tight on the foot (which I don't like). If they wear unusually well or poorly, I will come back and edit this.

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Reviewed in the United States on December 26, 2025

Verified Purchase

Noah

Cuba, US

★★★★★ 5

MY FAVORITE SOCKS

Size: Large, Color: (001) Black / Black / Pitch Gray

I bought these originally at my local UA store and had to buy more. They are my favorite daily wear.

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Reviewed in the United States on February 25, 2026

Verified Purchase

SD-out

Chelsea, US

★★★★★ 4

A sock with real support and thickness!

Size: Large, Color: (001) Black / Black / Pitch Gray

I’m pretty happy with these. It seems like sock manufacturing changed 10-15 years ago, and it’s become hard to find pairs that are actually thick and durable. I bought these for an event where I knew I’d be on my feet all day, and they did not disappoint. They provided excellent support throughout the day, even while wearing shoes that typically make my feet ache after just a couple of hours. Glad to finally find a pair that feels well-made.

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Reviewed in the United States on April 10, 2026