Aluminum alloy Utility Cutter Knife 1.aluminum alloy body 2.blade:sk5 steel,carbon steel 3.blade size:9*80*0.4mm,18*100*0.5mm Aluminum alloy Utility Cutter Knife1.aluminum alloy body2.blade:sk5 steel,carbon steel3.blade size:9*80*0.4mm,18*100*0.5mm4. retractable,5 blades spare5.packing:sliding blister card,12pcs in a box,144pcs in a carton Aluminum alloy Utility Cutter Knife