Boom 1 spool for long reach Boom. Even when the heavy Pile driver attachment is attached, the inching operation is improved. Stick 1 spool for long reach Stick that support Stick cylinder mounting under Boom. Even when the heavy Pile driver attachment is attached, the inching operation is improved and the cylinder voiding is prevented. Stick 2 spool for long reach Stick that support Stick cylinder mounting under Boom. Even when the heavy Pile driver attachment is attached, the inching operation is improved and the cylinder voiding is prevented.