Extend your SDS-MAX drill and core bits 29-1/2" with the Milwaukee® exclusive Max-Lok™;;; 29-1/2" SDS-MAX Adapter. The SDS-MAX adapter lets you lengthen and use SDS-MAX core and drill bits in a variety of rotary hammers. The connections are designed for optimum energy transfer, so you won't lose drilling productivity, while the Max-Lok Extension System lets you get more value out of your SDS-MAX drill and core bits. The Max-Lok Connection Adapter (sold separately) accommodates SDS-MAX, SDS-PLUS or spline shanks for a truly universal system that's compatible with all common rotary hammers. The adapter securely locks the two SDS-MAX shanks (bit and extension) together for maximum versatility and strength in extensions from 12-1/2" to 82-1/2".