Small ER collet on a long shaft will reach into places a drill chuck or larger ER collet won't especially if you get the ones from ARC with the smaller diameter "mini nut" Will also hold milling cutters safely.
0.3-4mm drill chuck about 22mm dia
0.5-7mm ER11 chuck with mini nut 16mm dia
J
Edited By JasonB on 03/10/2018 09:59:07