Rockwell RK2813K 6-1/2-inch Circular Saw 18 V LithiumTech high performance battery LithiumTech weighs 40% less and take up to three times more charge cycles than Ni-Cd batteries No memory effect so batteries can charge anytime 6-1/2" 24T TCT blade BevelTrac for accurate cuts Bevel capacity 0-56 degrees with a 45 degree positive stop