Analogs of : KS TOOLS - BT022416
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KS TOOLS BT022416 
Substitutes
Substitutes Socket Wrench Insert
Bolt Head-/Nut Design: Double HexagonDrive side (profile): RectangleSpanner Size: 16,0Square Drive Tang Size: 12.5 (1/2")mm (inch)Total Length: 38mmWeight: 50g