LEGO Technic, Axle 4 (3705) has been used in at least 897 Lego sets over the past 43 years, since it was first used in 1970. This part can be most commonly found in Technic sets where it has been included 312 times. You are most likely to find this Lego part in Black, but keep an eye out for it in Light Gray which is the rarest colour, only being found in 1 set.
LEGO Cross Axle 4m Colour List
|Lego Colour||Lego Item Number|