Slice 10404 Pointed Tip, 4 Replacement Ceramic Blades, for Slice Box Cutters, Stays Sharp up to 11x Longer Than Steel Blades, Finger Friendly For Use Exclusively with Slice Cutting Tools SKU# 10400, 10503, 10512, 10513, and 10514 4 Dual-Sided Slice Ceramic Blades - Rounded Tip Prevents Accidental Injuries 1 Ceramic blade = ~20 high-end metal blades - lasts up to 10x longer than metal Never rusts, chemically inert, non-magnetic, non-sparking, non-conductive, no oil coating like traditional metal blades Less Blade Changes Means Less Injuries = Reduced Chance of Injuries & Lower Costs 1% of Slice sales are donated to fund Autism research at Lucile Packard Children's Hospital - Stanford University