# Weighing Device Usages for scales and other devices that measure weights. ## Topics ### Getting the Usages [`kHIDUsage_WD_CalibrationCount`](/documentation/HIDDriverKit/kHIDUsage_WD_CalibrationCount) [`kHIDUsage_WD_DataScaling`](/documentation/HIDDriverKit/kHIDUsage_WD_DataScaling) [`kHIDUsage_WD_DataWeight`](/documentation/HIDDriverKit/kHIDUsage_WD_DataWeight) [`kHIDUsage_WD_EnforcedZeroReturn`](/documentation/HIDDriverKit/kHIDUsage_WD_EnforcedZeroReturn) [`kHIDUsage_WD_RezeroCount`](/documentation/HIDDriverKit/kHIDUsage_WD_RezeroCount) [`kHIDUsage_WD_ScaleAtrributeReport`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleAtrributeReport) [`kHIDUsage_WD_ScaleControlReport`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleControlReport) [`kHIDUsage_WD_ScaleDataReport`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleDataReport) [`kHIDUsage_WD_ScaleScaleClassGeneric`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleScaleClassGeneric) [`kHIDUsage_WD_ScaleScaleClassIIIEnglish`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleScaleClassIIIEnglish) [`kHIDUsage_WD_ScaleScaleClassIIILEnglish`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleScaleClassIIILEnglish) [`kHIDUsage_WD_ScaleScaleClassIIILMetric`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleScaleClassIIILMetric) [`kHIDUsage_WD_ScaleScaleClassIIIMetric`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleScaleClassIIIMetric) [`kHIDUsage_WD_ScaleScaleClassIIMetric`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleScaleClassIIMetric) [`kHIDUsage_WD_ScaleScaleClassIMetric`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleScaleClassIMetric) [`kHIDUsage_WD_ScaleScaleClassIMetricCL`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleScaleClassIMetricCL) [`kHIDUsage_WD_ScaleScaleClassIVEnglish`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleScaleClassIVEnglish) [`kHIDUsage_WD_ScaleScaleClassIVMetric`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleScaleClassIVMetric) [`kHIDUsage_WD_ScaleScaleDevice`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleScaleDevice) [`kHIDUsage_WD_ScaleStatisticsReport`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleStatisticsReport) [`kHIDUsage_WD_ScaleStatus`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleStatus) [`kHIDUsage_WD_ScaleStatusFault`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleStatusFault) [`kHIDUsage_WD_ScaleStatusInMotion`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleStatusInMotion) [`kHIDUsage_WD_ScaleStatusOverWeightLimit`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleStatusOverWeightLimit) [`kHIDUsage_WD_ScaleStatusReport`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleStatusReport) [`kHIDUsage_WD_ScaleStatusRequiresCalibration`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleStatusRequiresCalibration) [`kHIDUsage_WD_ScaleStatusRequiresRezeroing`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleStatusRequiresRezeroing) [`kHIDUsage_WD_ScaleStatusStableAtZero`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleStatusStableAtZero) [`kHIDUsage_WD_ScaleStatusUnderZero`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleStatusUnderZero) [`kHIDUsage_WD_ScaleStatusWeightStable`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleStatusWeightStable) [`kHIDUsage_WD_ScaleWeightLimitReport`](/documentation/HIDDriverKit/kHIDUsage_WD_ScaleWeightLimitReport) [`kHIDUsage_WD_Undefined`](/documentation/HIDDriverKit/kHIDUsage_WD_Undefined) [`kHIDUsage_WD_WeighingDevice`](/documentation/HIDDriverKit/kHIDUsage_WD_WeighingDevice) [`kHIDUsage_WD_WeightUnit`](/documentation/HIDDriverKit/kHIDUsage_WD_WeightUnit) [`kHIDUsage_WD_WeightUnitAvoirTon`](/documentation/HIDDriverKit/kHIDUsage_WD_WeightUnitAvoirTon) [`kHIDUsage_WD_WeightUnitCarats`](/documentation/HIDDriverKit/kHIDUsage_WD_WeightUnitCarats) [`kHIDUsage_WD_WeightUnitGrains`](/documentation/HIDDriverKit/kHIDUsage_WD_WeightUnitGrains) [`kHIDUsage_WD_WeightUnitGram`](/documentation/HIDDriverKit/kHIDUsage_WD_WeightUnitGram) [`kHIDUsage_WD_WeightUnitKilogram`](/documentation/HIDDriverKit/kHIDUsage_WD_WeightUnitKilogram) [`kHIDUsage_WD_WeightUnitMetricTon`](/documentation/HIDDriverKit/kHIDUsage_WD_WeightUnitMetricTon) [`kHIDUsage_WD_WeightUnitMilligram`](/documentation/HIDDriverKit/kHIDUsage_WD_WeightUnitMilligram) [`kHIDUsage_WD_WeightUnitOunce`](/documentation/HIDDriverKit/kHIDUsage_WD_WeightUnitOunce) [`kHIDUsage_WD_WeightUnitPennyweights`](/documentation/HIDDriverKit/kHIDUsage_WD_WeightUnitPennyweights) [`kHIDUsage_WD_WeightUnitPound`](/documentation/HIDDriverKit/kHIDUsage_WD_WeightUnitPound) [`kHIDUsage_WD_WeightUnitTaels`](/documentation/HIDDriverKit/kHIDUsage_WD_WeightUnitTaels) [`kHIDUsage_WD_WeightUnitTroyOunce`](/documentation/HIDDriverKit/kHIDUsage_WD_WeightUnitTroyOunce) [`kHIDUsage_WD_ZeroScale`](/documentation/HIDDriverKit/kHIDUsage_WD_ZeroScale) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)