STRONG MAGNET holds long-nosed mechanical carpenter pencil securely to hat. The magnet clips on INSIDE of hat. The thin design means you won't feel it. The strong magnetic clip will hold the mechanical carpenter pencil to the side of your hat. The magnet is so strong it will 'catch' the pencil when it gets near the magnet. The clip can also be clipped on a pocket, or belt. Long nose of pencil allows for marking thru holes that are up to 1 3/4 inch. deep. Six lead refills included - four black, one red, one yellow. We assemble and TEST EVERY PENCIL AND MAGNETACLIP to make sure they work as advertised!