Blind - you just can't see it. Put on molding, drawer fronts, and trim without unsightly nail holes that need to be filled, sanded and possibly stained. The tool will set the first half of the nail without dulling the point on the second half. The magnetic tool holds the nail in place while you tap it in. The nail is 3/8 on one end and 3/16 long on the other end. Tap the longer end into the main piece of wood and the shorter end into the trim piece. Made in China.