Brake sets and operates without minimum preload100% inspection of hooks per ASME B30 and easy hook replacement is permitted by bolted hook blocksAll steel body for durable strength in a smaller sizePowder coat and plated external l parts to resist corrosionLaser etched stainless steel nameplates with required OSHA /ASME B30 warnings, model and stamped serial numberLong life fused brake friction disc cannot crack, shatter or absorb moistureGrade 100 zinc plated load chain Optional overload protection is by one directional slip clutch that only slips in the lift directionAmbient Temperature range: -40? to +140?F (-40? to +60?C)Meets: OSHA, ASME B30.21 and ASME HST-3. In addition the ultimate strength is 5 times Work Load Limit (WLL) meeting structural requirements of ASME HST-3 Appendix A, for use in marine and other applications as specified by US Department of Defense DOD.APEX rating: ATEX certified II 3GD c IIB 60oC X for limited use in Hazardous EnvironmentsFinal assembly and load test in the USA from imported components. Supplied with certificate by serial numberOpen chain guard allows visual inspection and does not trap contamination.