Welding/Fabricating Lead Holder Actuation Type Not Applicable Casing Material Metal Holder Dry Time Immediate Glow-in-the-Dark No Grade Scanner Compatibility Not Applicable Hardness Hard Indoor/Outdoor Usage Indoor/Outdoor Marker Size Group Fine Marking Tip Shape Flat Maximum Application Temperature Not Applicable Minimum Application Temperature Not Applicable Overall Length 6 1/4 in Pigment Color Graphite Pigment Maximum Surface Temperature Not Applicable