The 3M Hookit paper sanding disc: your clever product for plastic and metal surfaces. Use 3M Hookit paper sanding disc 245 for initial and in between surface preparation. Our 245 paper discs have a strong E carrier that ensures a long service life. Great for all coarse and intermediate grinding work. Due to its open scattering, the 3M Hookit sanding disc 245 is ideal for all coarse and intermediate grinding work. The special, fully resin-bonded aluminium oxide abrasive grain ensures optimal cutting properties in all applications.