ITEM NAME:1pc T-slot 1/2 Inch Shank Router Bit T-track Slotting Woodworking Milling Descriptio n 100% brand new and high quality Materials: Body --SSIMd Hardened Steel Blade - Industrial grade micro grain car.YG6 alloy blade with high-grade welding, stable quality, high efficiency. Lower blade height: 8 mm(5/16"). The blade height: 12 mm(15/32"). T-type high-grade straight edge knife. We want to make sure you are happy with our item.