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Notch 1/2" Rigging Block w/ 5/8" Ultra Sling (51257)
Notch 1/2" Rigging Block w/ 5/8" Ultra Sling (51257)
Notch 1/2" Rigging Block w/ 5/8" Ultra Sling (51257)
Notch 1/2" Rigging Block w/ 5/8" Ultra Sling (51257)
Notch 1/2" Rigging Block w/ 5/8" Ultra Sling (51257)
Notch

Notch 1/2" Rigging Block w/ 5/8" Ultra Sling (51257)

4.0 · 12 reviews
$294.99
or 4 interest-free payments of $73.74 with
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  • The Notch 1/2" Rigging Block with Ultra Sling is a small sized lightweight arborist block that accepts working lines up to 1/2” (13mm) diameter
  • Low profile, secure, easy-to-open captive screw pin lock with a high wall, a full diameter and improved anchor sling protection
  • Hot forged aluminum side plates with rope friendly rounded cheeks and precision CNC machined aluminum sheaves with wide bend radii
  • Wide, concave upper sheave with a 5/8” anchor sling. Flared side-plates reduce twisting in complex rigging scenarios. Upper sheave diameter: .75 in. (19mm), lower sheave diameter: 1.5 in. (38mm)
  • Working Load Limit: (WLL) 20 kN (4,496 lbs.) MBS: 100 kN (22,480 lbs.)

Free standard shipping on orders over $99. Expedited shipping available at checkout. 30-day hassle-free return policy on all unused items in original packaging.

Customer Reviews 12 reviews

M
Mike T.
Verified Buyer
Jan 28, 2026

Excellent seat. The wide base is incredibly comfortable for all-day work. Setup was straightforward and the build quality is exactly what you'd expect from Petzl.

J
Jason R.
Verified Buyer
Jan 15, 2026

Been using this for 6 months now. Super comfortable for long canopy sessions. Only wish it came with the shackles included at this price point.

S
Sarah K.
Verified Buyer
Dec 30, 2025

Fast shipping from Climb Higher and the seat is top notch. The adjustable width feature is a game changer for different harness setups. Highly recommend.

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Notch 1/2" Rigging Block w/ 5/8" Ultra Sling (51257)
Notch 1/2" Rigging Block w/ 5/8" Ultra Sling (51257)
$294.99

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