We can manufacture the coil nails at following spec: 1. SHANK SMOOTH, SCREW, RING 2.POINT DIAMOND, BLUNT, CHISEL, POINTLESS 3.FINISH BRIGHT, VINYL COATING, EG(WZ. YZ) 4.ANGLE 16°, 10°, 0° 5.WINDING FLAT, DOME(CONICAL)