Avoid chipping and cracking while drilling Acrylic material. KnKut Performance Acrylic Point Drills feature a chip-free point that is ground to a 60-Degree angle to avoid chipping and cracking of acrylic material. This bit also includes a 0-Degree rake angle which keeps the drill bit from grabbing when it breaks through plastic, acrylic, laminate or Plexiglas. Sizes over 1/4-Inch have 1/4-Inch Shanks.