The stainless steel sponge-iron used in Geib® SuperGator Straight Grooming Shears the same metal used tomake Katana Samurai Swords is triple-tempered for ultrapureness creating a metal density that provides supremebalance. Rockwell Hardness rating of 59 for an amazingly durable blade edge Optional ring inserts create a better fit and reduce rubbing and blistering Ultra smooth scissoring capabilities balance and comfortThe teardrop-shaped thumb hole and angled thumb ring on theGeib® Super Gator Straight Grooming Shears set your hand in anatural position. Because the thumb is not overextended duringscissoring the tension on the hand and wrist is greatlyreduced and scissoring is accomplished with less effort. Calibrated "click-plate" tension dial allows you to customizethe tension of the shear. The tension dial "clicks" yoursettings into place with each turn so tension will not loosenduring scissoring. Straight Shears measure 8. 5". Material: Stainless Steel Size: 8 1/2" Straight Shear Rockwell Hardness Rating: 59