Blocstop™ fall arrest device For man riding applications a protective secondary safety device is mandatory. For this use Tractel offers the BSO and BSA Blocstop™ products. In response to the most strict safety regulations, they can easily be attached to most fittings. The «Tirfor®» jaw-type unit fitted inside the Blocstop™ closes onto the safety wire rope and as the jaws grip over a large area causes no damage to the wire rope. Click on the button to download the instruction manual for the BSO 500, 1000 and 2050/2360.