-For use with core drills, UNC thread with SDS PLUS receptacle. Made of 45 steel, strong and durable, not easy to break. Attention: This is SDS PLUS, not SDS MAX!!! Buy OYOANGLE Men's Vintage Plaid Pint Sweate Vest Sleeveless V Neck Pullove Knit Tank Tops and othe Vests at . Ou wide selection is elegible fo fee shipping and fee etuns Cprosp 1-1/4'' Unc Thread Core Drill Bit To Sds Max Adapter ... Don't miss out on this item! There are only 3 left in stock. Add item... Core Drill Bit Adapter 1-1/4 7 Threaded Male SDS Max Hammer Drill Diamond UNC Concrete Granite Masonry -Made of 45 steel, strong and durable, not easy to break. Please check the connector is compatible before purchase. Sds Plus Extension SDS Adapter For Core Drill Bit With 1-1/4 UNC Thread Angle Drill Adapter Item Specifications: Material: 45 steel Color: Black This adapter converts 1 1/4 inch UNC to SDS PLUS. Fits all rotary hammers with SDS PLUS receptacle. Description: This adapter converts 1 1/4 inch UNC to SDS PLUS. Package: 1x 1 1/4 inch UNC to SDS PLUS adapter.