Rigid body joining, small screw control resistance is small at first, butthe moment screw buckles, produces burden Fastening time, is reletively short Elastic body joining (with packing) as well as plastic tapping clamping as the screw rotates, resistance increases even until it sinks in. Fastening time, is reletively short Fastening of drilling screws as well as tapping screws when the screw goes in there is resistance, light at first, but increases as it sinks in. Fastening time is comparatively long. Wood screw fastening little resistance at the start, but increases the further it goes it. Fastening time is comparatively long.
I tried using various plus bits (looking flashy things, expensive things), but I felt that it was less chubby and less comfortable. Although it looks graceful, I thought that it is a thing to know goodness when used. If possible, I think it would be a little longer and shorter than the standard ones.