Blackie Collins Blackie Collins ButtonLock A/O. 4" (10.16cm) closed. 3" (7.62cm) blade. Thumb stud. Pocket clip. Weight: 1.4oz. Black glass-filled polymer construction. Hang packaged. Specifications for Blackie Collins ButtonLock A/O: Manufacturer: Blackie Collins Blade Length: 3 in Closed Length: 4 in Knife Application: Everyday Carry Serrated: Partially Serrated Handle Color: Black Lock Type: Button Lock Opening Method: Assisted Opening Weight: 1.4 oz Package Type: Other Color: Black Blade Type: Partially Serrated Package Contents: Blackie Collins ButtonLock A/O