1. and die cast aluminum. 2.Convenient one hand operation with safety trigger for easy and safety start. 3.Compact, design for easy maneuverability. 4.90 degree angle head allows flexibility in confined areas. 5.Good choice for smoothing, deburring, polishing and grinding. Professional grinder kit giving complete flexibility for most grinding and polishing needs. with small volume, light weight, high speed, low noise, small gas consumption, high concentricity and so on characteristics, the operation is simple, rapid and convenient. It is widely used in all kinds of mold, hardware products, and glass, stone, handicrafts, ornaments, circuit board manufacturing and so on industry need blank shaping, cutting, grinding and finishing homework. Color: As Shown Material: plastic+metal Package Contents: 1 x 1/4 inch 90 Degree Grinder Micro-Air Die Grinder Tool Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.