细节
Bits, toolholders and handtools:
six dee bits and three spade bits signed Holtzapffel; three metal-cutting toolholders with 9/16-inch square shanks; and ten various handtools, some by Holtzapffel (23)
six dee bits and three spade bits signed Holtzapffel; three metal-cutting toolholders with 9/16-inch square shanks; and ten various handtools, some by Holtzapffel (23)