Interchangeable tip for convenience. Hexagonal head prevents rolling and can be used as a standard drill chuck - nail set doubles as drill extension. Knurled locking collar for easy nail release and reversal. Accepts standard screwdriver bits for versatility. Long, beveled tip for easy nail head alignment. Fully hardened, precision-milled steel for long life. Set includes 1/32 in, 2/32 in, 3/32 in and #2 point Phillips nails.