Features MULTIFUNCTIONAL:The pneumatic engraving pen combined with different bits is suitable for grinding, polishing, drilling, carving, cutting and deburring. STABLE AND FIRMLY CLAMPING: The pneumatic grinder can clamp different grinding tools for work, thus ensuring accurate and efficient work. ADJUSTABLE SPEED: The rotation speed can be adjusted freely and the required speed can be adjusted according to actual needs. HIGH CONCENTRICITY: Adopting linear bearings to increase product concentricity, wear-resistant and durable. EASY TO USE: The pneumatic grinder is lightweight, fashionable and streamlined in appearance, has a comfortable grip. Specification: Item Type: Pneumatic Pencil Grinder Set Material: aluminium alloy. Product mode: KP 6102 Free speed: 65,000 rpm Clamp specification: approx. 2.4 mm/0.09 inches, 3 mm/0.12 inches. Working pressure: 0.4 to 0.6Mpa Input Connector: 1/4" Package list: 1 x Pneumatic Grinding Pen 2 x grinding head. 1 x air inlet connector. 1 x air hose. 2 x keys. 1 x clamping head. 1 x oil 1 x plastic box Package List 1 x Pneumatic Grinding Pen 2 x Grinding Head 1 x Air Inlet Connector 1 x Air Hose 2 x Wrench 1 x Clamping Head 1 x Oiler 1 x Plastic Box