Milwaukee 48-95-6070 - 7-1/2" Extension for Small SDS Plus Thin Wall Core BitsThe Milwaukee 7 1 2 in. extension for small thin wall core bits expands your drilling capacity. Made of high quality steel, the extension extends your drilling by up to 7 1 2 in.. it attaches easily to SDS plus core bit adapters and features smooth, tough thin core construction for dependability. For deeper drilling, use the extension with a Milwaukee 8 in. or 12 in. SDS plus adapter shank. Features Highly durable: made of high quality steel with