10 pcs. 1/2" 2-13mm Drill Chuck Plus Shank Adapter Socket Hex Square Converter Description: [Handle size thread]: thread attachment: 1/2"-20UNF, handle range: ok. 2-13mm/5/64"-1/2", handle adapter thread: 1/2" [Material]: made of metallic material. Unique patented locking function, conveniently tightened by hand, breaking traditional locking methods. [Quick Installation] Quickly connects to any and converts to quickly switch tasks. for many different types of wireless devices. [Keyless design] Keyless and self-clamping design allows you to quickly and easily manually change do bits and from the handle. Quickly switch tasks and keep work moving. [NOTE]: The product canNOT be used in the opposite direction do clockwise! NOT suitable do impact screwdrivers or heavy duty applications. Specification: Material: metal Size Chart: Length: 7.3 cm/2.87 inch The package includes: 10 Drill Chuck Keyless Converter Kit