Allen 20mm Double High Load Tii-On Block

20mm Double High Load Tii-On Block

The 20mm Double High Load Tii-On Block combines the strength and versatility of the Tii-On attachment system with the enhanced performance of stainless-steel high load sheaves. Designed for soft shackle attachment, the stainless-steel head loop provides maximum strength, reliability, and minimal cheek separation under load while maintaining correct block orientation.

Key Features

Stainless steel head loop for secure soft shackle attachment
Minimises cheek separation under load and maintains correct orientation
High Load stainless steel sheaves for faster rolling speeds, higher working loads, and reduced friction compared to standard acetal sheaves
Patented Dynamic Bearing System with twin rows of stainless steel ball bearings running on a stainless steel rail for superior load capacity and durability
Integrated Becket via a large central rivet, providing a lightweight and rope-friendly attachment point for cascade systems
Ideal for high-load applications requiring smooth, efficient line handling

Fitting Guidance: For maximum strength, the attachment line must be fed around the central axle and through the head of the block. Where possible, double Tii-On blocks should be fitted using a crossed or through-threaded attachment method to keep the load pulling the side cheeks together. Non-crossed Tii-Shackles should only be used in low-load applications.