Featuring our patented dynamic bearing technology of stainless-steel ball bearings running on a stainless-steel rails, the result is an unsurpassed performance under load when compared to others available on the market. The Tii-on block range is available in sheave sizes from 20mm up to 60mm and offers a large weight reduction when compared to the standard dynamic block range. What differentiates our Tii-on blocks from other tie on designs is the large stainless-steel ring at the head of the block. This ring is designed to stop the block from capsizing once spliced into a system as well as reducing the chance of the cheeks splitting apart. However, when splicing these blocks to an attachment that is wider than the block, a boom for example, it is still recommended that a cross splice is used to reduce the outwards load put onto the block. – When attaching a Tii-Block it is vital that you go through the loop in the head of the block, around the central axle and then back out through the loop at the top. The Tii-block range must be tied like this otherwise it will fail. The central axle is supposed to take the main load of the block. The central axle in the Tii-Block range is also designed to be used as a becket to give a wider range of cascade option.