# Kafka Connect SetMaximumPrecision SMT Usage Reference for Confluent Cloud The `SetMaximumPrecision` Single Message Transformation (SMT) ensures all decimal fields in a Kafka Connect structure do not exceed a specified maximum precision. ## Limitations - The `SetMaximumPrecision` SMT is only supported for fully managed Source connectors. - This SMT updates the record schema only. The actual message data remains unaffected by the transform. #### IMPORTANT Confluent only supports this SMT on Confluent Cloud. For complete details, see the official [SetMaximumPrecision SMT](https://jcustenborder.github.io/kafka-connect-documentation/projects/kafka-connect-transform-common/transformations/SetMaximumPrecision.html) documentation.