shank size: 1/4" quick change hex
Thread size:1/2"-20UNF
Fit holesaw: 14-30mm(9/16"-1 3/16")
Jiangsu Feida Tools Co.,ltd Houxiang Town Danyang City Jiangsu Pronvice China Tel:+86-511-86312981 Fax:+86-511-86120015 email:feidachina@hotmail.com
web: www.feidatools.net