Check the listing for details. Stubby Boring Bar, Carbide Tip: Min. Bore: 1/8", Max Depth: 1/4", Shank 1/2". Condition: New. Listed at 36.00 USD. Stubby Boring Bar, Minimum Bore Diameter= 1/8", Maximum Bore Depth= 1/4", Shank Diameter= 1/2", Overall Length= 1-21/32", Carbide Tipped, Made in the USA by APT