Kobra 390 S5Kobra 390 S5 classic line shredder comes with steel cabinet, sturdy steel gears and two metal chain drive systems which offer reliability and resistance to wear, carbon hardened steel cutting knives unaffected by staples and clips. Motor thermal protection: 24 hour continuous duty double motor drive technology without overheating and duty cycle. It can shred up to 47 sheets at a time and also CD DVD Blu ray disks, credit cards and floppy disks.