18.5mm Hole drill bit is made of HSS high speed steel High precision, smooth cutting, especially impact resistance, wear resistance. Hole drill bit is through a special heat treatment, sharp edge, high strength. Long life durable and practical.
18.5mm Hole drill bit is made of HSS high speed steel High precision, smooth cutting, especially impact resistance, wear resistance. Hole drill bit is through a special heat treatment, sharp edge, high strength. Long life durable and practical.