The Pampered Chef Mix 'n Chop is the greatest for chopping hamburger for such things as tacos and spaghetti sauce.  It has more surface contact and blades than your typical turner.  Other uses are chopping and mixing up the ingredients for egg salad, chicken salad and tuna salad.  Made of high quality nylon, it is safe to use on cookware and will not scratch.  The handle is shaped for an easy grasp.  The Mix 'n Chop is heat resistant to 428 degrees and is dishwasher safe.  The cost is only $10 and it also has a 5 year guarantee.  It is one of the most used tools in my kitchen!!