uptodatetools 1/2-20UNF Keyed Drill Chuck 1.5-13mm Clamping Range with SDS-plus Shank, 1/2 Socket Square Converter
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•JAW CHUCK - Drill Chuck with universal keyed 3-jaw design can firmly hold a variaty of bit shanks ranging from 1/16" to 1/2"(1.5mm to 13mm)•PRECISION - Compared with keyless chucks, the classic keyed chucks is more precise, for holes that have very small tolerance. Machinists typically prefer keyed chucks for greater accuracy.•2 ADAPTERS - The 2 different types of adapter can easily convert your tool to a drill, suitable for multiple connecting needs; The the 1/2" square socket adapter for impact wrench and the SDS-plus adapter for hammer drill / rotary hammer.