This screwdriver-type bit is made to fit Jacobsen mower/vehicle bedknife attaching screws.
Bedknife Screw Tool For Jacobsen
This screwdriver-type bit is made to fit Jacobsen bedknife attaching screws with a 3/8′ drive. Use this bit with a torque wrench to secure the bedknife to its bedbar. With clean bedbar threads and new screws torqued to 250-300in.-lb. (288-345 KgCm) a bedknife will be securely fastened.