All devices must meet the general requirements for devices found in, Make sure devices meet these requirements, WAC 296-806-20044.

You must make sure restraint or pullback devices:

(1) Prevent the operator from reaching into the point of operation or withdraw the operator's hands from the point of operation before motion of the machine creates a hazard.

(2) Have fasteners, pins, and other items used to secure and maintain the setting of the device applied in a way that minimizes loosening, slipping, or failure during use.

(3) Are worn inside gloves, if used, so if a glove becomes trapped inside a machine or tool, the device can still remove the operator's hand from the hazard area.