The GolfWorks Premium Utility Knife

The GolfWorks Industrial Strength Utility Knife is a heavy duty
ergonomically designed utility knife built to last through years of
service. The Fast Change Blade option allows for blades to be changed
with a quick twist of blade locking switch eliminating the need to
disassemble the knife to simply replace the blade. Each knife comes with
an installed hook blade and a standard blade for general cutting. Also
included are 5 additional hook blades (GWUKRHB). The handle has a an
easily accessible compartment for storing extra blades

Premium Utility Knife Instructions