The product in the image is likely the Total 6 Pcs Screw Extractor Set (TACSE0061). Here are its specifications:
Material: Cr-V (Chrome Vanadium Steel)
Hardness: 48–52 HRC
Thread Type: Coarse thread
Sizes:
#1: 3–6 mm
#2: 6–8 mm
#3: 8–11 mm
#4: 11–14 mm
#5: 14–18 mm
#6: 18–25 mm