Masters Limited Edition Putter with Headcover and all Packaging, New in box. Never used, always in box. Registration number 146 of 350. Date of Issue: April 4-10, 2011. Each S20C soft carbon Steel Putter head has been CNC(Computer Numerically Controlled) milled using the world’s most precise manufacturing Technology to achieve perfect balance with exacting technology in order to achieve perfect balance with exacting tolerances for lie, loft and weight.