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This 1:50 Three tine thumb is designed specifically to fit the First Gear Komatsu PC138 excavator model with the stock bucket only! This thumb is not compatible with our PC138 buckets, or coupler. I also offer thumbs to fit various other excavator models, and will be releasing more over time.
The thumb is designed to use 1/16 brass rod for pins. This model comes with a spare set of cylinders just incase. Some assembly is required upon delivery of the printed item and the hydraulic pistons will need to be separated from each other. ** Caution this item has very small fragile parts that could pose a choking threat to young children**