The TaylorMade Spider Mini Putter gives the same Spider performance in a small package. It comes in Tour Red & Diamond Silver finishes with the putter head being 15% smaller than the standard Spider head. It has the same stability and high MOI (Moment of Inertia) performance as its bigger brother but in a more compact mid-mallet design. The importance of a high MOI cannot be overstated. In golf the higher the MOI, the more resistant the clubface is to being twisted at impact making it more stable for that all important contact.