3" Sheet Metal Holcutter Quad Lead 1/8" DOC 14284 C365-11 7/16 x 20UNF draw bolt

7/16 x 20UNF draw bolt thread

t45 torx bit

and delivers Up to 25% more torque to the fasteners

End diameter 22

for strength & wear

3" Sheet Metal Holcutter Quad Lead 1/8" DOC 14284 C365-11 7/16 x 20UNF draw boltThe Holcutters, are not hole saws. They're precision ground, heat treated tools that easily cut thru the stock rather than ripping, tearing, and pushing thru as do typical hole saws. They can produce holes three times faster and cleaner than hole saws in sheet metal and have dramatically extended tool life too. All sizes have a "shoulder" to prevent plunge thru, which is especially useful when drilling into live electrical boxes. See for yourself why