woobles Step Drill Bit Set - high-speed steel 5-piece 50 Sizes

Features: The step drill bit kit includes five standard step drill bits, which can be replaced with 50 individual drill bits. The drill bit can replace multiple drill bits to meet different needs. The high-speed steel step drill is made of alloy material, strong and durable, and the surface is plated with titanium. Titanium coating can reduce friction and lower the operating temperature, which can effectively extend the service life. The stepped drill tip adopts a cemented carbide drill bit, which has an impact resistance 10 times that of an ordinary center punch; before drilling, the automatic center punch can mark positioning holes to prevent the drill and screws from sliding. Parameter: Product name: 5-piece set of inch step drills in aluminum box Weight: 0.6kg Aluminum box size: 15.5*12*4.5CM Drill bit specifications: Step drill 3/16-1/2'' (3/16, 1/4, 5/16, 3/8, 7/16, 1/2) Step drill 1/8-1/2'' (1/8,5/32.7/32.1/4,9/32,5/16,11/32,3/8,13/32,7/16,15/32,1/2mm) Step drill 1/4-3/4'' (1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4) Step drill 3/16-7/8'' (3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/ 4, 13/16, 7/8)

Step drill 1/4-1-3/8'' (1/4, 3/8, 1/2, 5/8, 3/4, 7/8, 1, 1-1/8, 1-1/ 4,1-3/8)