Unikut Step Drill Spiral Flute 4-20Mm | Accessories - Spiral Flutes (Metric) Beak 16106 Impact Hex Bit Holder

16106 Impact Hex Bit Holder 3/4"Dr (Takes 107-16 Bits)16106 3/4"Dr Impact Hex Bit Holder - Takes 107-16 Bits

) x 1/8in Imperial Viton O-Ring -10pk

Champion 1/8in x 3/4in Roll Pin - 100pk

Mini : approx

Unikut Step Drill Spiral Flute 4-20Mm | Accessories - Spiral Flutes (Metric) Beak 16106 Impact Hex Bit HolderSPIRAL FLUTE STEP DRILLS The Titanium Nitride coating significantly increases the tool life by providing the following benefits: Increases surface hardness to 85HRC Ceramic surface reducing friction by up to 30% Especially resistant to cold welding. Suitable for cutting a wide range of materials. Sizes Included: 4 6 8 10 12 14 16 18 20mm Step Length: 3. 0mm Overall Length: 74. 5mm Shank: 8mm