Craftsman CMHT65033 Sq #2 x 4-in Acetate Screwdriver
27 Types of Screwdrivers + Names (Comprehensive Guide) | Linquip
Choosing the Right Screwdriver Bit - iFixit Repair Guide
P.L. Robertson, a Canadian, invented a square-socket drive which bears his name. Vintage Robertson screwdriver set, circa 1960. Wooden handles with original paint and still in working condition. : r/BuyItForLife