ITEM NAME:3pcs Single Flute 90 Degree Edge Chamfer Countersink Drill Bit 3/8 1/2 3/4 #gib Store Home Promotion Hot Item Add to Fav.Quantity: 3pcs. Type: single Flute 90 Degree. 1x 3/8" Drill Bit. 1x 1/2" Drill Bit. 1x 3/4" Drill Bit. Material: High Carbon Steel. Weight: 60G. 3/4" 6.35mm 19mm 8~13mm.