STX ProFit 6 Long Putter The STX ProFit 6 Long Putter features interchangeable inserts and weights for the ultimate in customization to adapt to all playing conditions. The STX Soft Face Technology provides superior directional control, decreased ball skid and reduced ball deformation. The ProFIT 6 comes standard with the black insert. The Customizing Kit is sold separately. Additional Features: ProFit Customizing Kit is included with the putter