almost certainly quite possibly the most common are Nos. one and 2, While No. 0 might be wanted for many pretty smaller screws and 3 and four for large screws. (See The purpose / Bit dimension tutorial for specifics of https://delilahvngs447499.weblogco.com/29774419/the-smart-trick-of-types-of-screw-heads-that-no-one-is-discussing