GrooveMaster Golf Club Groove Sharpener with Comfortable Adjustable Large Rubber Grip and 6 Cutter Carbide Tungsten Steel Head - with Printed Full Color User Operations Manual &#9989; INCLUDES EASY TO READ 12-PAGE BOOKLET. Ships from USA in Genuine BRAND Packaging &#9989; EXTENDABLE LENGTH MODEL has 8 different settings; SUPER MAN-SIZED GRIP for easiest re-grooving experience &#9989; MEASURING A HARDNESS OF 65 ON THE ROCKWELL SCALE; made from high grade precision tool vacuum heat treated carbide tungsten steel &#9989; PACKAGED IN CLEAR PLASTIC SAFETY TUBE FOR EASY STORAGE; ships inside protective foam bag &#9989; PERFECT FOR ADAMS, CALLAWAY, COBRA, CLEVELAND, NIKE, PING, TAYLORMADE, TITLEIST, WILSON, and other iron brands, including pitching, sand, lob, approach, gap wedges and other utility clubs <span class="a-text-bold">MEASURING A HARDNESS OF 65 ON THE ROCKWELL SCALE</span>, this premium cutter head is made from high grade precision tool vacuum heat treated carbide tungsten steel and is unmatched by competing models. The head has 6 groove cutters (3 for &#034;U&#034; type club grooves and 3 for &#034;V&#034; type grooves). Fantastic results on both V and U (square) grooves for the highest spin rates possible. Precision ground and engineered to exacting tolerances to ensure that it does not compromise USGA rules regarding groove width and depth. You benefit by getting the maximum durability and re-grooving effectiveness of any groove tool on the market.The hardness of the cutting head is everything. You simply do NOT get such head cutter quality with any other competing model. <span class="a-text-bold">REPLACEMENTCUTTER HEAD (sold separately) </span>is easy to replace usingexisting screw andstandard and commonly found 2.5mm hex wrench as in image shown (wrench not provided). Takes less than 2 minutes to upgrade. <span class="a-text-bold">SUPER COMFORTABLE MAN-SIZED RUBBER GRIP</span>. Gone are the days when your hand ached after only a few minutes re-grooving your irons. Clean, re-groove and restore your irons in half the time it takes with most of the existing groove sharpeners that either too small or too uncomfortable to use effectively. <span class="a-text-bold">NEW ADJUSTABLE LENGTH DESIGN</span>The GrooveMaster gives you 8 different options for setting the handle length, providing you with unprecedented comfort and ease of use. Simply press with your thumb to extend or retract the handle to instantly find the handle length that YOU desire. <span class="a-text-bold">PACKAGED IN CLEAR PLASTIC SAFETY TUBE FOR EASY STORAGE</span>. Includes long chain for easy attachment to your golf bag in those cases where you want to take the tool with you on the course. Ships inside protective foam bag for ultimate protection in golf accessories. <span class="a-text-bold">Comprehensive 12 pageFull Color USER OPERATIONS MANUAL</span>in printed booklet form.