Aa and Eb are the same except for their different materials, (Aa is made of steel, Eb is made of stainless steel) They are more suitable for small lathes such as 0618. Although they can also be used on lathes such as WM210v, this is not a long-term solution. If you want to use it on a lathe like WM210v, I will recommend Ec or Ed, which are specially made for WM210v.

Quick Change Tool Post Set Aa-Type has 4 holders for lathes with a center height of no more than 110 mm(4.33? Recommended top slide width :45-60mm(1.772.36? Adjustable turning tool height : 12mm(0.47? Lathe swing : 120-220mm(4.728.66? Aa Model : S/N:01011, Hole diameter : 13/18mm. Eb Model : S/N:01012, Hole diameter : 13/18mm.

(Aa is made of steel, Eb is made of stainless steel). Tool post&holder with precision profile-ground gearing. Plenty of working positions foe more tool holders. Adjust height of cutting edge easily and accruately.

Q How do I choose them? A If you use it less often, you can choose 45# steel, if you use it more often it is recommended to choose stainless steel, it can accompany you for a longer time. Q How to choose the right quick-change tool holder for your lathe?
A You can choose a model with a tool holder width "Lg" similar to the width of the square tool holder of the lathe. But other parameters also need to be considered. Width of tool holders for different models.