ER32 Collet Set Chuck with MT2 ER32 M10 Motor Extension Rod, 19pcs ER32 2-20MM Spring Collet Chuck Set for CNC Engraving Machine & Milling Lathe Tool(ER32/19 PCS)

best part is cheap. Runout on my set was between .2 and .06mm. Fit and and finish was not great but better than the videos i've watches of bangood items. The size seemed all over the map. the 6mm collet would not even click into the nut. The 5mm collet seemed undersized and you could see the collet expanding to fit in a pin for testing. My $30 mt2 drill chuck has 0.02mm runout... I will be returning this.Edit: i decided to do a return swap and the 2nd set has a very good grind on the mt2 holder with about .005mm runout. the collets are a marginal and are running out as much as .1mm in the 5 I have tested.