NHP1R NAIL HOLE SLOT PUNCH MALCO | For punching holes in vinyl and aluminum siding. Punches horizontal slot for adding or elongating nail holes in siding to accommodate irregular stud spacing. Slot measures 5/32 in x 3/4 in. Throat depth of 5/8 in with 8-1/2in L. Ergonomic Redline handles with unique one-hand operation latch.