The IDEAL Electrical 36572 7/16 in. Hex Arbor, 1/2-20 Thread consists of a solid steel construction. Flat head set screw in body allows easy replacement of the pilot drill bit. The quick change arbor's versatile design allows instant changing of hole saws without tools and without having to remove the arbor from the chuck.

• Thread size: 1/2-20
• Chuck size: 1/2 in.
• 1/4 in. high-speed drill pilots for fast hole starting
• Durable steel construction