Hardened and ground steel needle points, one straight and one bent, are fixed to a knurled body.
National Hardware Hinge Butt Marker, Removable, Series: V511 3.5, 3-1/2 in Length, Steel, Black, Wall Mount, For Marking Mortise on Residential Hinges
Knurled aluminum handle provides precision grip and the tungsten carbide point makes precise marks to 1/100". End cap magnet pickups up stray metal shavings, convenient pocket clip and locking screw chuck allows the point to be reversed for safe storage in pocket or toolbox. Hexagonal head prevents tool from rolling off work surface. Conforms to government specifications GGG-S-131E.