Te-Y-Bk Sds Max Rotary Hammer Core Bit 45/550SDS Max (TE Y) rotary hammer core bit for cutting holes in concrete Connection end: TE Y (SDS Max) Base material: Concrete, Brick, Masonry, Limestone Working mode: Hammer drilling, Drilling only Features Dry drilling with 20% longer lifetime than other SDS Max percussion core bits Virtually dustless drilling when used with the optional TE DRS Y dust removal system for Y type combihammers Easy socket cutting and drilling penetrations in masonry