Ask a tour pro & they are probably familiar with this product.

The Sindelar On Trac System includes a hardwood putting rail and patented "T" attachment that can be easily attached to most standard putters.

The attachment ensures that your blade remains square to the target at all times.

Includes Sindelar's video "Putting Made Simple" - a real value itself!

Some competitors
list low prices
then exaggerate the
weight of the products
so you get charged more
for shipping