History of Robertson Screws

by Fred Scheuler In 1906 Peter Lymburner Robertson, wounded by the slippery slot of the primitive screwnail, invented the square recess

Slot type are also included because that is where the screw began and a double slot becomes a cross drive, and the Robertson or square drive enter the story

slot machine sahara Improved grip: The square drive of Robertson screws allows for a tighter grip and greater torque, making them less likely to slip or strip the

slot garansi kekalahan 100 saldo kembali terbaru They're so good nobody will buy the old straight slot or Philips Slide a screw onto the screwdriver Hold it horizontally Holds fast Can you