true hollow grind 1/2" wedge grind chisel grind blunt grind figure 2 figure 3 figure 4 1/2" 1/2" 1/2" figure 6a figure 6 figure 11 figure 7 figure 8 figure 6b clamp feet clamp feet blade thickness adjustment clamping screw guide bar correct incorrect knife blade burr turned up by hone hone figure 10 razor edge guide and cub guide anatomy