B place: B ideas are found in machine thread screws and they are for metallic, plastic and plywood, where by a pilot gap has become drilled. They in many cases are simplest for shallow holes They have uniform threads, and they are solid with a better torque power. This suggests you require much less socket screws to fasten two materials than shoul

To paraphrase, a few Robertson squares are superimposed in a successive 30° rotation. The design is comparable to that of your double-sq., in each circumstances The thought staying that it resembles a sq. (Robertson) but can be engaged at much more Regular angles by the driver bit. These screws could be pushed with standard Robertson bits. Hex sc