An adapter is required to use the SDS-Plus bit on the SDS-Max electric hammer^ Adapter/Connect SDS-Max to SDS-Plus - Small size, easy to carry Unit weight: 521 grams. Material: Chrome Vanadium Steel/CR-V/. silver^ Corrosion resistant SDS-Max to SDS-Plus tool holder adapter. Long life - very strong, solid and efficient. The adapter is ideal for masonry and construction work^ Converters/Accessories-Designed for quick work with various size drilling and assembly tools. Self-locking, productivity increased by 30% when changing drill bits - also has good abrasion resistance ^ Applications: construction, concrete slabs, carpentry, interior and exterior landscaping, renovation projects, masonry, domestic and industrial applications Uses: recommended on jackhammers Use adapter / jackhammer^