Makita is the leading manufacturer of professional power tools on the marekt. The B-66793 Impact Black Mag Bit Holder is a magnetic bit holder with 1.4" hex shank and a black coating to prevent rusting and corrosion, for use with Impact Drivers. The B-66793 has a higher durability with a longer life than standard bits, suitable for applications for screwdriving, joinery, assembly, fixings and more. The B-66793 works well with both 25mm and 50mm Impact Black screw bits (not included).