Magna Primer

[img_assist|nid=11974|title=MagnaPrimer|desc=|link=none|align=right|width=163|height=268]The trade name for a primer cartridge which incorporates, in addition to the primer charge, two Magnadet delay detonators and is designed for use in quarry blastholes. It is connected to the special exploder by passing the primary coupling wire through a hole in its centre.