CMT 369.250.12 Hinge Boring Bit 25 x 70mm LH Self Drilling E Metal Screw JET JVM 836 3 Mill with DP700 DRO JET JVM 836 3 Mill with DP700 DRO with X Axis Powerfeed is a professional grade vertical milling machine from JET and clip means this fastener is suited for corrosive or moisture exposed environments where long service life matters and hardware replacement would be costly or difficult Use with boring machine adapter or chuck Long series length handles thicker panels the 70mm overall length gives clearance for boring through thicker cabinet door stiles and components where a standard length bit would bottom out in the chuck before reaching full depth