Item Type: Magnetic Drill Annular Cutter Arbor_x000D_Model: MTR8_x000D_Color: Silver_x000D_Material: Steel_x000D_Inner Diameter: Approx. 19.05mm / 0.8in_x000D_External Cooling Fixture: External cooling is required when drilling (external cooling nozzle or can can be used for watering, equipment without a kettle is preferred)_x000D_Application: Magnetic drill, radial drill, bench drill, lathe, vertical drill drilling equipment, etc. 1Made of selected steel materials, strong and durable, has a long service life. 2Suitable for magnetic drill, radial drill, bench drill, lathe, vertical drill drilling equipment, etc. 3Simple operation and quick punching, with stable connection and good performance during use. 4The inner diameter is 19.05mm, great workmanship, perfect replacement for the old one. 5External cooling is required when drilling, and can be watered with an external cold water nozzle or a can. 1 x Ring Arbor 1 x Wrench