?therwen Therwen 30 Pcs Safety Box Cutter Knife of Stainless Steel Concealed Blade Package Opener with Tape Splitter for Carton Cardboard Wrap Letter Work Bag Straps Film Utility Tool (Black) Black 30 is up for auction in Office Products. The current bid is $2.50, 90% below the $23.95 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.