Birchwood Casey Presto Gun Blue Pen
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Creates a durable blue-black finish
Penetrates hard steel and won't rub off
Simply use like a regular marking pen
Thick blue color for one-coat coverage
The Presto Gun Blue Pen quickly and easily penetrates hard steel and gives a durable blue-black finish that won't rub off. Simply use like a marking pen for one-coat coverage on non-stainless steels.