Set of 30 diamond burrs with 3mm ball heads for electric grinders and electric engraving.

Features:1.Shaft diameter 3 mm / 0.12 inch, ball head diameter 3 mm / 0.12 inch, and length 45 mm / 1.77 inch.
2.150-grit ball-shaped drill bits for precision drilling with diamond cutting power.
3.Black nickel plating significantly increases hardness and improves grinding efficiency.
4.No-jump CNC milling guide ensures stable grinding.
5. High strength and high temperature resistant, durable and does not shed sand.
Specifications:Condition: 100% Brand New
Item Type: Grinding Wheels
Material: Diamond
Color: As shown in the pictures
Grit: 150 grit
Shank Diameter: Approx. 3mm/0.12in
Length: Approx. 45mm/1.77in
Bit Diameter: Approx. 3mm/0.12in
Quantity: 30pcs/set

Package list:

1 set of 3mm grinding bits (30pcs)

Note:

1. The grinding bits should be tightened firmly during installation and there will be no pulsation! 2. The rotational speed should be as high as possible and the linear speed should not be less than 1020 m/s.3. This product has a 3mm handle, please check the clamping range of the machine before purchasing!