HSS, ground flute. | Ultra-high quality high speed steel construction ensures optimal performance for years and years to come. | | Features and Benefits | • Using this pilot drill with a holesaw and arbor ensures the hole is accurately cut | • Ultra-durable performance | | Notes | • K14C: for use with K1, K2, K6, K11, K13 arbors | • K14D: for use with K4 arbor