Zak Tool Round Swivel Key Black. Also works with ASP cuffs and locks and many other cuff and box locks on the market. Zak Tool's Small Round Swivel Key has a knurled handle for easy grip. Made from strong and durable steel wire. This swivel key has a steel shank and fits all standard handcuffs on the market. This item comes with a vinyl-dipped protective holster. Zak Tool's Small Round Swivel Key fits all standard handcuffs on the market including mechanical and friction lock cuffs. Zak Tool's Small Round Swivel Key fits all standard handcuffs on the market. This handy little tool comes from the guy who started Zak Tool. Specifications for Zak Tool Round Swivel Key: Manufacturer: Zak Tool Color: Black Package Contents: Zak Tool Round Swivel Key Zak Tool ZT11: Round Swivel Key Black