PTI 170pc Tin Coated HSS Drill Bit Set Tin coated drills are for use at high speeds where the temperature is high enough to bring the coating’s functional use into play. Solid ground HSS drill bits Tin coated for extra strength and durability 170 pieces Sizes: 10 each 1.0 – 8.0mm x 0.5mm increments & 5 each 8.5 – 10.0mm x 0.5mm increments Supplied in a strong metal carry case to keep the drill bits organised
