Bi-metal hole saw OREN 79 mm with countersink

HSS-Bi-Metal hole saw with countersink 

• When preparing electrical installation boxes into plasterboard, wood, chipboard or other boards, the circumferential ring of the box always remains raised.
• This special Bi-Metal hole saws with a countersunk ring enable perfect immersion of the box, including the circumferential ring, in one working step.
• The Bi-Metal hole saws with a pilot bit and an adapter are used to drill the required holes, a special countersinking ring fitted with carbide teeth grinds the material around the perimeter so that the box fits perfectly into it.
• The extrusion spring serves to easily remove the drilled material from the hole saw and prevents it from clogging.

Use:
assembly of electrical installation boxes in plasterboard, wood, chipboard and other boards