3 pcs HSSCo5% M35 Spiral Grooved Step Drill Set in Wooden Box
Surface: Cobalt Coated or White Finish are available.
Item No.: SDB305
Size include:
4 - 12mm x 9 step ( 4 - 12 x 5 step are available ) 4 - 20mm x 9 step 4 - 30mm x 14 step