Fowler FOW72-520-110 Dial Indicator Revolution counter hand. Supplied with lug backs positioned through 90 degree increments Spindle rack and contact points of hardened stainless steel for long wear; cases forged brass, satin chromed; gear wheels hard brass pinions of silver steel, hardened tempered and burnished on pivots; lapped on teeth Microfine graduations in black for continuous readings and red for balanced readings