Value Collection 8 Piece Corner Rounding End Mill Set. Single End 4 Flute Uncoated High Speed Steel (material grade M2). Includes: 1/16" (3/8" Shank); 3/32" (3/8" Shank); 1/8" (1/2" Shank); 5/32"(1/2" Shank); 3/16"(1/2" Shank); 1/4"(1/2" Shank); 5/16"(1/2" Shank); 3/8"(1/2" Shank).