ST1 TPMS Scan Tool Kit w/ 28 EZ-Sensors Application Info: Part #21335-ST1EZ28, the bundle contains 28x #33500 and Schrader ST-1 Tool. Features: Programs EZ-sensor® family of products OBDII quick-connect cable Can measure tire tread depth (additional equipment required) Unique and more user-friendly software Customer/job management feature “ID-Sync” function for matching scanned IDs to vehicle ECU IDs Schrader's ST-1 Programming Tool offers unique, user-friendly software, customer/job management feature, "ID-sync" function for matching scanned IDs to vehicle ECU IDs, and programs the EZ-sensor® family of products.