To change the drive bar, you can simply remove the cap on the top of the motor.
Working voltage 7~9 volts
The machine comes with 3 more drive bars of different hardness FREE.
Size & Net weight: 64 grams, 110*32*42mm
If you want to buy other tattoo grips, click the link below:
Buy tattoo grips: https://onlytattoosupply.com/product-category/tattoo-grips/