Features: -High quality bearing, long life, improve grinding speed. -The 90-degree grinding machine is designed according to ergonomic principles to make the operation more comfortable. -With angular grinding machine, the advantages of the grinding machine reduce the noise problem during machining. -Portable pen type structural design, with small volume, high speed, low noise, large torque, low energy consumption, smooth and lighter, etc., it is easy to operate. -It is widely used in all kinds of moulds, hardware tools, self-adhesive sandpaper, bowl sand wheel, self-adhesive wool film and so on. -Used for Glass, stone, arts and crafts, hand ornaments etc Need to be trimmed, cut, grind, carve, trim, and need mirror polishing industries. Specification: -Type: 90-degree angle type -Size: 17mm x 137mm x 49mm -RPM: 23500rpm -Air pressure: 0.4-0.6MPa -Working Pressure: 4-6KG -Air consumption:120-160 L/min -Grinding wheel size: 30mm Package Includes: -1 x Air Micro Die Grinder Kit Set as pictures show. -Included the Installation Instruction. Note: -Please be carefully check the goods appearance, size, shape and then compare your original goods before ordering, thank you. -Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. -Since the size above is measured by hand, the size of the actual item you received could be slightly different from the size above. Please don't mind, thank you!