The o works r line putter is a mid sized mallet with a center shaft high contrast versa alignment microhinge face insert adjustable weighting and a superstroke gripunmatched roll with our new microhinge face insertthis new technology will change the way people look at roll off the putter face forever our microhinge insert technology provides incredible gains in topspin and roll at impact regardless of your stroke the stainless steel microhinge plate is co molded into our thermoplastic ela