Integral 3-Spiral Blade Stabilizer, Integral 4-Spiral Blade Stabilizer (string type ,near bit type ).

The working hardfacing surface (also called as wall contact )materials available separately are

 (1) carbide insert,

(2) Inserted diamond compound,

 (3) Low temperature brazing tungsten carbide slug,

(4) Surface bead welding abrasive welding rod, etc.