2.6mm C2/K20 Tungsten Carbide Straight Shank Spiral Flutes Twist Drill Bit 4pcs 4mm(ID)x8mm(OD)x300mm(L) you can attach them with

you can attach them with screws

The Knob Handle is 1mm in height

Specifications: Cutting Edge Diameter: 11mm / 0

Rating: AC 250V-10A

Size: 40mmx70mm

2.6mm C2/K20 Tungsten Carbide Straight Shank Spiral Flutes Twist Drill Bit 4pcs 4mm(ID)x8mm(OD)x300mm(L) you can attach them withSpecifications: Drilling Diameter: 2. 6mm 0. 102" Flute Length: 20mm 0. 79" Shank Diameter: 2. 6mm 0. 102" Overall Length: 40mm 1. 57" Material: C2 K20 Tungsten Carbide Finish: Uncoated Cutting Hardness (Max.): HRC45 Package Content: 4pcs x Twist Drill Bit Descriptions: Constructed from medium grain C2 K20 tungsten carbide, the drill bit has good toughness, high hardness (HRA89) and wear resistance. With good milling and cutting performance, can