DJ Essentials - The Only Choice Replaceable Cartridge and Stylus for Durability and Reliability Be confident you are prepared for anything with the Numark GrooveTool! precision engineered for the working DJs with Numark's legendary reliability, this cartridge and stylus won't let you down! Don't be fooled by this sleek design, the GrooveTool is designed to withstand the rigours of the road so you can count on this night after night thanks to its seamless compatibility to any traditional headshell mount and a robust diamond tipped replaceable stylus, Give your deck the cartridge it deserves and root your focus on what's important - your performance!