Makita B-45559 16" Self Sharpening Bull Point, 1‘1/8" HexMakita B 45559 The bull point chisel is the ideal accessory for general concrete breaking and chipping. However, effective breaking requires that the chisel remain sharp to penetrate hard concrete. The new Makita 16 Self Sharpening Bull Point for 1 1 8 Hammers features an innovative design engineered to keep the bit point sharp longer than traditional bits. Standard bull point bits dill over time and can become less effective at breaking concrete.