Those are the exact octopus clips that I have. When I used them for root lift, I used the mini-sized ones. They did a decent job. My concern is that since I have thin/fine hair at the roots, a larger clip would have a lot of empty space in it if I used one for that purpose.
Type: 3b/3c (i), below shoulder length. Modified CG since 5/2004; growing gray since 5/2007.
CO wash: A-O GPB LYY, Salon Care Honey Almond, Devacurl OC, rotating others
Leave-ins: BWC, KCKT, coconut oil overnight
Styling: BRHG, MGA Sculpting Gel, Aubrey Organics Mandarin Magic Gel, LOTD AVG, LALSG
DT: Terax Crema, Moroccan Oil Restorative Mask, Je Veux Revitalizing Mud Mask, Kiehl's Olive Fruit Oil Deeply Repairative Hair Pak, Curl Junkie Deep Fix