Female Worm (Spiral Helix) for antique versions of BOJ Models and Other Brands Wall and Table Mounted Corkscrew for Both Synthetic and Regular Corks - Original Part - Thread Metric M5 X 0.8 mm This part is the original replacement for the antique models of BOJ wall-mounted corkscrew. To be used with both regular and synthetic corks. Made in Spain. Founded in 1905, BOJ is the part manufacturer. If you are not sure what type of worm (male or female) please contact us before ordering, we will help you. Thread Metric M5 X 0.8 mm