Arbor size: 5/8-11 inchesFor use with Tiger®, Vortec Pro® and high density 4 1/2-inch, 5-inch and 7-inch flap discs with 7/8-inch arbor holeEachArbor size: 5/8-11 inchesFor use with Tiger®, Vortec Pro® and high density 4 1/2-inch, 5-inch and 7-inch flap discs with 7/8-inch arbor holeWeiler® 5/8-11 inches Thread Adapting Nuthttp://s7d5.scene7.com/is/image/Staples/s0479303_sc7?$std$http://s7d5.scene7.com/is/image/Staples/s0479303_sc7?$thb$http://s7d5.scene7.com/is/image/Staples/s0479303/Weiler-5-8-11-inches-Thread-Adapting-Nut/product_710775Weiler® 5/8-11 inches Thread Adapting Nut0.00