This type of screwdriver is lightweight. Its handle is well-made of silicone rubber. Blade for high speed steel (HSS) has high ductility, hardness and wear resistance. Grooved handle has a maximum friction with fingers and prevents slippage. Attached 4 pieces of blades with slotted 1.6,1.8mm and crossed 1.5,1.8mm are hidden inside handle. Easy to get and replace it. More blades choice can be used to this screwdriver handle.
They are:
Slotted 1.6mm and 1.8mm
Crossed 1.5mm and 1.8mm
Hexagon 2.02mm, 2.32mm, and 2.57mm
Star 2.52mm and 2.82mm

Benefits:
Grooved handle prevent slippage;
Blade is of high ductility, hardness and wears resistance; blade is replaceable with more spare blades choice
Attached blades are hidden inside handle. Be easy to get and replace;