Driver size: 1/4"(6.35mm) 3/8"(9.53mm) 1/2"(12.7mm),Average length: 2"(50.8mm),Hex size: 1/4" (6.35mm). driven sleeve is used, can be the original hexagonal side after installation on size into square size, which can be used for the installation of the sleeve,is a good accessories to convert.
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