ER25 collet set Made of Grade 1065 Carbon Steel. ER25 MT2 M10 Motor Extension Rod Using standard ER25 engineering collets, 30000 rpm, perfect for router table use. A small and suitable wrench for use. Colour:Silver Material:steel Package Contents: 16 x ER25 spring collet set (Includes 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm). 1 x ER25 MT2 M10 motor extension rod. 1 x small and suitable wrench Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.