Th GripSlip is the fastest, simplest and easiest way to change your bat grip.
It has many advantages over other devices like the bat cone. Bat cones are difficult to use, require lots of wrist strength, and are confusing. Plastic bags are messy, fiddly and not very efficient.
By contrast, the GripSlip is simple, effective and fast. Standard grips can be applied by anyone, even juniors.