1.If the toner or drum cartridge in your machine is in good condition, but it ran out of life,You can renew it by installing the reset chip and reuse it for one more cycle.
2.It is 100% brand new high quality ,saving big money for you, easily to install,just find out the old chip and replace it ,then the new chip can work automatically by itself,there is not any special tools need.

Compatible with machine model:
Lexmark MS310d, MS310dn, MS312dn

Lexmark MS315dn, MS410d, MS410dn. MS415dn

Lexmark MS510dn, MS610de, MS610dtn, MS610dn MS610dte


Compatible with cartridge part No:
501H 
504H  

page yield: Black 5,000 Pages (A4 paper at 5% coverage)

Package included:
10 x Toner Cartridge Chips