JIS drivers are precision-made to fit Japanese-standard screws used in cars, motorcycles, and appliances for a secure, accurate grip
JIS and Phillips cross profiles differ. JIS B-1012 has a smaller corner radius and pointier tip, while Phillips tip is longer and won't fully seat. This mismatch causes poor grip, cam-out, and screw damage
On the other hand, a Japanese cross-point screwdriver fits both JIS and Phillips screws perfectly. If you don’t know what type of screw you are fastening, then we would highly recommend using a JIS screwdriver since it’s universal for both screw types