Spyder 600939 27Pc Tct & Bim Hole Saw Kit Pro Pack (1 Each 600880+600887)Spyder 600939 600880 Kit contents: 1 3 8, 1 1 2, 1 3 4, 2, 2 1 2, 2 3 4, 3, 3 1 2, 4, 4 1 4, 4 1 2, hex 10 TCT pilot bit, hex 10 HSS pilot bit, hex 10 rapid core eject adapter 5x faster and up to 10x more cuts than standard bi metal hole saws and effortless plug ejection by dropping out the core with the push of a button Cut more materials: cuts wood w o nails, cement fiber board, plastic, porous concrete block, brick, ceramic wall tile under hardness