Better Homes and Gardens on MSN11 个月
8 Types of Screwdrivers and How to Use Them
Flathead screwdrivers can easily slip from the screw head, posing a safety risk to the user. Where possible, replace slotted ...
来自MSN4 个月
Why Is It Called a “Phillips Head” Screwdriver?
In 1933, Phillips obtained the rights to a socket screw invented by John Thompson that had a cross-slotted rather than slit head. To turn the screw, one had to use a tool that resembled an arrow ...