#13 (0.1850) Diameter. 1.000" Working Length. 1.250" Body length. 1/4-28 thread. Made of extra durable Cobalt Steel.
THREADED DRILL BITS
Specifications: 135° split-point angle prevents walking . 1/4-28 threaded shank . Surface treated to resist abrasion and minimize tendency of soft metals to load drill, making it ideally suited for drilling Aluminum and mild Steel