I have a rather large assortment of 5 inch scroll saw blades. But, because many of the blades are quite small, it can be difficult to identify the various sizes. Also, some of the teeth are so tiny I need a magnifying glass to see the tooth direction. Now, however, I’ve made it easier on my eyes by color coding the top end of each blade with a spot of paint. For example, the number 5 blades are red, the number 7 are green, and so on. And since the color code is always applied to the top end of the blade, I immediately know the tooth direction.
– Bruce Montag