Barber Scissor blades come in various styles and will either have a bevel or convex cutting edge. The bevel edge is the traditional style with a steep angle they are a robust, durable and reasonably easy to sharpen, well suited to cutting dry hair.
In recent years Convex blades have gained in popularity. The blade edge has a fine angle with a honed cutting line and hollow ground inside which produces an incredibly sharp smooth cutting action. These versatile blades favour wet hair and are the best design for slide and point cutting and texturising.
Blades can also be serrated, fine lines running across the blade length which help hold the hair, the downside is an increase in noise and blade resistance.
Barber Scissor handles are either opposing or offset. The traditional style is with opposing finger holes which were the only choice available for many years hence the industry standard. This style means that you are cutting with a fairly closed hand which puts extra strain on the thumb and wrist.
The more recent innovation is the offset handle design with a slightly shorter thumb extension. This allows cutting with a more open hand which reduces the pressure on the thumb and wrist, a huge advantage to comfort and health.
The scissor tensioner allows you to tune the blades so that they meet accurately. Correct tension is so important, too loose and the blades will fold or bend the hair, too tight and they will push it and go blunt quickly. A good tensioner will have a ball bearing centre which reduces friction for smooth operation spreading the load over the stock of the scissor handle most evenly. Tensioners are either tightened by a finger and thumb control or by a spanner.