ITEM NAME:Titanium Step Drill Bit Set High Speed Steel | 3-Piece Set | Total 28 Sizes S9P9 Titanium Step Drill Bit Set High Speed Steel | 3-Piece Set | Total 28 Sizes S9P9 in drilling holes in plastic, aluminum, copper, stainless steel and many other types of sheet metal 135 Degree SPLIT POINT TIP: increases cutting speed with self-centering and prevents walking TWO-FLUTE DESIGN: clears chips faster and allows particles to escape easily T4.RI-FLATTED SHANK: fits into power tools chuck securely and eliminates slip Two-flute design for faster, smoother cutting. colour: Gold&silver Material: High Speed Steel + Titanium size: 1 / 4-3 / 4: 74x9mm 1 / 8-1 / 2: 77x6mm 1 / 2-3 / 16: 60x6mm Package Contents: 3X British ladder drill Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..135 Degree SPLIT POINT TIP: increases cutting speed with self-centering and prevents walking. T4.RI-FLATTED SHANK: fits into power tools chuck securely and eliminates slip. Material: High Speed Steel + Titanium.