1. Material: High speed steel. 2. Application: mainly used to cutting Acrylic etc. 3. Exellent quality and resonable price. Specifications:1. Material: made by High speed steel.double flutes spiral bits, more stable while cutting things.2.Model detail: CED-8mm, CEL-20mm, SHK-8mm, OVL-70mm3. Application: used to cutting Acylic, PVC, MDF etc.4. Cheaper than the solid carbide ones, lower your cost ...