Bits with a depth stop are necessary when working with soft material that can be squeezed by the head of the screw. Such bits are excellent for working with sheets of drywall. The peculiarity of these bits can be called magnetic tips, which firmly attract the screw and do not allow it to fall or warp before screwing. Each bit is 65mm long and is made of stainless steel. The shank diameter is a standard 1\4 inches. The delivery set consists of 5 bits.