A millwright was working outside of the maintenance shop on a hopper that the millwright was building for the CKD briquetter. While drilling a pilot hole for a liner, a 1/8"" drill bit broke. Once the 1/8"" drill bit broke, it pierced the leather gloves at the seam. The seam was between the thumb & index finger. The drill bit went into millwright's flesh about 1/4"" deep.