ArtisanShow 5PCS HSS Cobalt Step Drill Bit Set Multiple Hole 50 Sizes Cobalt Titanium Conical Cone Drill Hole Cutter Core Drill Bits with Aluminum Case

Main Features: -- The step drill bit set includes five standard HSS step drill bits that can replace 50 individual drill bits. A drill bit can be used as a substitute for multiple drill bits to meet different needs. -- Double cutting blades and X-type openings design ensures a faster and smoother cutting, and 3-sided shank design prevents slip in drill chuck. -- Provided with small pressure and the sets can cut through the wood, sheet metal, steel and other surfaces. Hard automatic center punch can mark the positioning hole to prevent the drill and the screw from sliding. Sizes: #1: 3/16" to 1/2" 6 Steps (3/16'', 1/4'', 5/16", 3/8'', 7/16'', 1/2'') #2: 1/8" to 1/2" 13 Steps (1/8", 5/32", 3/16'', 7/32", 1/4'', 9/32", 5/16", 11/32", 3/8'', 13/32", 7/16'', 15/32" , 1/2'') #3: 1/4" to 3/4'' 9 Steps (1/4'', 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4") #4: 1/4" to 1-3/8"' 10 Steps (1/4'', 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8") #5: 3/16" to 7/8" 12 Steps (1/4'', 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8") Package weight: 0.450kg Package Size(L x W x H): 25 x 8.00 x 5.00 cm / 9.84 x 3.15 x 1.97 inches Package Contents: 1 x 1/4-1-3/8 ladder drill bit,1 x 3/16-7/8 ladder drill bit,1 x 1/4-3/4 ladder drill bit,1 x 1/8-1/2 ladder drill bit,1 x 3/16-1/2 ladder drill bit,1 x Aluminum Box Product Safety Disclaimer: We do not accept any responsibility or liability for misuse of this or any other product. All our products are extensively tested to comply with rigorous and strict QC standards. Professional Services: If you have any doubts about our products, please feel free to contact us. After you receive the product, if you have any question about the use of methods and product performance, we will provide you with professional, caring sales service. We offer a 60-day refund guarantee.