Mini Titanium-Fused Carving and Trimming Double-End Tools Series are handmade from high carbon tempered stainless steel. Then fused with a thin layer of titanium nitrite on the surface to increase strength and hardness, less friction and rust resistance. The Soft Foam Sleeve provides excellent comfort and grip. The titanium-fused blades are exceptionally sharp and three times harder than steel for maximum performance, creating a more resilient cutting edge than conventional carbon steel knives.