Shank plate kit with weld-on drivelug provides a durable cutting edge featuring replaceable teeth, any brand of auger can be upgraded by welding the shank plate kit to the underside of the auger’s bottom plate.Use SB-25 screw bit and 140-S weld-on drivelugs only, no shank plates.Use SB-35 screw bit and 141-M weld-on Divelugs only, no shank plates.Use SB-45 screw bit and 141-M weld-on Drivelugs only, no shank plates.