1WIDE COMPATIBILITY: NAB hub adapter is suitable for Studer ReVox, for B67, for AKAI, for Teac, for Pioneer and other reel to reel player tape machine, meet your various usage needs. 2FINE WORKMANSHIP: 1 pair of NAB hub adapters, superbly crafted, perfect fit for your reel to reel tape machine, polished handle, gray base, for 1/4 10 inch size. 3LOCKABLE: 1/4 10 inch opener has lockable quality, no loosening, high standard of rotational concentricity, no shaking, more stable use. 4STRONG STRUCTURE: 10 Inch opener is made of aluminum alloy, ABS base and rubber ring, sturdy structure, not easy to damage and wearable. 5EASY TO INSTALL: For Studer ReVox universal loading device is simple and convenient to use, easy to install, effectively enhance your tape playback experience. 2 x1/410InchOpener