Sack Ups Knife Protector Knife Holder 5in Knifes AC. This knife holder from Sack Ups is silicone treated to prevent rust and to wick moisture away from your knives. The Sack Ups Six Knife Pouch will help keep your knives in pristine condition and looking brand new. Specifications for Sack Ups 6 Knife Pouch: Manufacturer: Sack Ups Closed Length: 5 in Package Contents: Sack Ups Six Knife Pouch Sack Ups AC806: Knife Protector Knife Holder 5in Knifes