[Design]: Double head design,it can adjust the depth by itself,automatically clamp the fixed screw firmly and not easy to fall off.The 1/4 inch with metal filter can prevent the burr and foreign matters from entering the air inlet and damaging the machine. [Features]: chamfering, no ripple, no noise, no heating after long-term use, stable operation and long service life. [Light and durable]: The speed can reach 30000rpm, and the depth is c0.1-c1.5. The body is small and exquisite, and the right fillet can be used with one hand. Five gears can be freely adjusted to the appropriate intake speed for use,which can improve the blade life, and is easy to operate and use. [Dlade replacement]: Use a hexagon wrench to loosen the plum screw,remove the baffle plate, remove the blade screw with a ring wrench,remove the old blade,and replace it with a new one. [Safety ]: Pressure plate type safety protection switch can reduce unnecessary injury. Alloy steel baffle, safety buckle and metal button switch safe use. Specification: Reversible depth:0.1mm-0.9mm Chamfering hole diameter: greater or equal to 7mm Intake pressure: 90Psi Minimum plate thickness: 3mm The shallowest opening depth:5mm Note: The symbol styles on both sides of the chamfering machine are random, 't accept the specified styles, but it does not affect the use, thank you. Colour: black and silver Material: metal Package Contents: 1 x Mini Pneumatic Chamfering Machine 2 x Wrench Only the above package content, other products are not included. Note: Light 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.