Check the listing for details. Mini Boring Bar: Min. Bore: 1/16", Max Depth: 5/16", Shank: 1/2" USA Made. Condition: New. Listed at 42.50 USD. Mini Boring Bar, Minimum Bore Diameter= 1/16", Maximum Bore Depth= 5/16", Shank Diameter= 1/2", Overall Length= 1-13/16", Solid Carbide Stem, Made in the USA by APT

$25.50
$42.50