Allen 20mm Back To Back High Load Apparel & Personal Gear The strength of the design

The strength of the design lends itself to be tied around the middle in the slight V shape

These combinations result in less friction

This design also reduces the deformation of the sheave under high static loads

which is common amongst other styles

Allen 20mm Back To Back High Load Apparel & Personal Gear The strength of the designAllen 20mm Back To Back High Load Dynamic Block. The sheaves face opposite directions to allow two control lines to run at a maximum of 180 degrees to each other. Held together with a strong stainless steel side strap and nylon mouldings ensures the block will not separate even under two very high opposing loads. The strength of the design lends itself to be tied around the middle in the slight V shape, meaning it can be used in applications such as