A microneedling scalp roller for thinning hair. You’ve just found the next musthave tool in haircare. Hairburst’s Scalp Roller for Thinning Hair is a microneedling scalp roller that helps to improve thinning hair and promote hair growth. Supported by various studies; the roller works by creating micro tears to induce the wound healing process; which helps to promote collagen production and cell regeneration. The tool can also be used to stimulate scalp circulation for a healthier scalp and aid the absorption of scalp treatments.