Countersunk screw heads feature an angular shape under the head in the screw. The countersunk head allows for flush installation into the material for the clean up, concluded appearance. The JIS screwdriver is really a cruciform, like Phillips, but is intended to resist camming out. When it can be done https://emiliossspm.blogdal.com/29761205/not-known-factual-statements-about-different-types-of-screw-heads