I'm not sure wacker if they use this or not..
Heres another that I got a real nice rasp from on Aluminum ,Secret wood on both sides and a Cherry strip in the Middle.
WHEN useing a Table saw and cutting a thin peace of wood stand to the side of the guide . I had a pc come flying from the blade and went right through my coat, grazeing my tumby,just like a Bullet. I thought I was shot! I hit the floor and doing the floppy Turkey, just kiddin about the flopping. Sure scared the liveing **** out of me. Please becareful with these tools if your useing them...BT