1Made of quality material, durable and sturdy, having long service time. 2User-friendly anti-slip rubber gasket design, considerate and practical. 3Compact in size and fashionable in appearance, convenient and easy to carry. 4Come with complete accessories for installation, wonderful jewelry accessory. 5Special designed for pneumatic engraving machine, used for jewelry processing. Features:1. Made of quality material, durable and sturdy, having long service time. 2. User-friendly anti-slip rubber gasket design, considerate and practical. 3. Compact in size and fashionable in appearance, convenient and easy to carry. 4. Come with complete accessories for installation, wonderful jewelry accessory. 5. Special designed for pneumatic engraving machine, used for jewelry processing. Specifications:Condition: Length: Approx. 7.5cm / 3in Application: Jewelry processing accessory Package List:1 * Set of Handpiece Accessory 1 * Hex Screwdriver Note: 1. This product needs to be connected to an air compressor with a power of 450W or more for use.2. Keep the pressure value at 0.2mpa when using, and adjust the speed to 23.3. When stepping on the pedal of the air compressor, the foot should be evenly forceful and slowly increase the strength.4. When installing the nozzle, the tightness should be appropriate, too tight will reduce the speed of use and affect the effect of use.