Packs of 2000 round head nails these plastic collated stick nails traditionally have a full round head while only giving marginally better holding power to clipped head nails they are preferred by the construction industry collation is angled at 21 to accommodate the overlapping heads smooth shank nails have exactly that a smooth appearance due to their regular form they can be produced at very high speed and are therefore the most economical type of nail however their holding power is the lowe