Hock 3 1/2'' Radius-Edge Krenov-Style Plane Assemblies. The Hock 3 1/2" Radius-Edge Krenov-Style Plane Assemblies are designed in collaboration with James Krenov's Fine-Woodworking studio in Fort Bragg USA. These blades are 3/16" thick and come... Hock 3 1/2'' Radius-Edge Krenov-Style Plane Assemblies