Slice 10503 auto retractable box cutter slice 10503 p this auto retractable box cutter from slice has a clever design that allows sharp cutting with minimal injuries for instance when cutting tape on boxes it is equipped with a replaceable patented ceramic safety blade with safer rounded tips and hook handle protecting the hands during use while limiting blade exposure making for a safer more comfortable cutting experience the blade lasts up to 10 times longer than metal blades and au