We're bookbinders and find the accuracy these blades give us to be perfect and they hold their edge well.
Blade No.10A Carbon Steel Non-Sterile Scalpel Blade - Pack of 100

The Swann Morton No.10A blade is ideal for minor surgical procedures like removing splinters and thorns. This blade is compatible with handles 3, 3L, 3 Graduated, 5B, 7, 9 and B3.