The tools tightens the relevant size of filter to the manufactures required torque using a suitable 3/8”D torque wrench
The large range enable this to fit most standard size filters form 2-1/2" to 3-1/8" (63.5-79.5mm).
By reversible function quick and easy to change the direction suitable for both left and right hand operation.
Use with 3/8" drive.