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DMM 3/4” Impact Block

 DMM 3/4” Impact Block  The upper sheave and screw are captive - no chance of losing pieces in the tree. Block accepts 3/4” slings and 3/4” ropes Save on a combo sling & block kit
DMM 3/4” Impact Block image DMM 3/4” Impact Block

Buy DMM 3/4” Impact Block

DMM 3/4” Impact Block
Block with 3/4” x 8’ Loopie

The DMM Impact Block is a premium arborist block designed not only for incredible strength but also for premium performance. The most eye-catching feature of the block is the incredible strength, but it is more than just a rugged piece of gear. The Impact Block is designed to be rope-friendly on all surfaces. The 3/4” version of the Impact block has a hollow stainless steel spindle which opens up advanced rigging options. The lower sheave is over 4" wide for a wider bend radius that preserves more strength in the rigging line.

This premium arborist block is suitable for medium to heavy tree rigging. See the videos tab for an overview as well as videos of the testing process DMM went through to develop the Impact Block.

Purchase this kit as a package with a 3/4” x 2-8’ Loopie sling and save.


DMM Impact Block Configureations

DMM Impact Block Test Videos

  • All edges smoothed for rope-friendly use
  • Captive upper sheave knurled screw lock
  • Wide bend radius on lower sheave
  • Loop for convenient hanging of block on saddle with rigging intact
  • Advanced rigging options through spindle
Manufacturer : DMM
Made in : UK
MBS : 300 kN
WLL (5:1) : 60 kN
Max Rope Diameter : 20mm / 3/4”
Max Sling Diameter : 27mm / 1”
Sideplate Material : Anodized, hot-forged aluminum
Sheave Material : Aluminum
Axle Material : Stainless steel spindle
Upper Sheave Diameter : 2 1/8”
Lower Sheave Diameter : 4 1/4”
Height : 8.875”
Width : 4.75”
Weight : 7.65 lb


  • NFPA 1983 (06ED) Class G
  • EN795(b):1997
  • EN12278:2007
  • CE Approved

DMM Impact Block Data Sheet

Download the Impact Block PDF Flyer

ANSI Z133-2017

The American National Standards Institute (ANSI) has released the ANSI Z133 safety requirements which apply to arboricultural operations. Components of a rigging system must be used within their Working Load Limits.

The DMM 3/4” Impact Block is ANSI compliant when used within the manufacturer Working Load Limits.

A green log weight chart (found in the Samson Rigging Wheel) will aid in determining loads in tree rigging.

The full ANSI Z133 safety requirements are available on our tree care standards page.

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