Independent Bearing Saver T Tool p18189 Compared to the simple plastic T-tool, this is a metal T-tool. Significantly more durable and robust than conventional T-Tools. Makes it easier to insert ball bearings into the reels without denting the shields.Independent Bearing Saver T Tool p18189 Compared to the simple plastic T-tool, this is a metal T-tool. Significantly more durable and robust than conventional T-Tools. Makes it easier to insert ball bearings into the reels without denting the shields.