Kobra 300 SS5 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 46 sheets at a time... https://allmaxestore.com/product/kobra-300-ss5-professional-shredder/