TR-1KW Series AC-S Handheld Simple Portable Tyre Regroover The tire grooving device mainly transmits current through a high-frequency inverter power supply, and forms a resistance heating blade in the handle to cut and groove the tires of trucks or tractors to produce lines, and restore the grip of the tires. It is 1 very practical Retreading tools; especially for the retreading and reuse of solid truck tires and other rubber products.