bbq factory BX6 Golf Club Iron Wedge Groove Regrooving Sharpener Cleaner Tool + one FREE Sharpening HEX Head Buy one get one FREE replacement sharpening head For all grooves, wedges, irons and all brands; Sharpens U square and V grooves as new golf club head. Three "U" and three "V" cutting sharps, 6 cutting sharps in total! (3 or 6 times more than other tools) Made of A2 Vacuum Heat Treated Tool Steel meeting a maximum hardness of 60-65 Rockwell. Tempered with Liquid Nitrogen at -300F to increase the strength and hardness of the "sharps". IMPROVED, BIGGER & LONGER USE (TPR, soft and comfortable) professional tool handle grip Precisely made with EDM and CNC cutting and molding machine.