1 Tonne Rechargeable Hanging Crane Weighing Scale – Black1 Tonne Rechargeable Hanging Crane Weighing Scale Black. Crane scale 1 ton. for weighing hanging loads. Simple and effective Crane Scale. No frills weighing allows for a low price but with high performance. Good Scales Low cost The OCS series are low cost Crane Scales for shipping operations, foundries, food processing plants, the mining industry, batching operations, offshore operations, the molding industry, test facilities, melting processes, etc