DRILLPRO 5 pcs HSS Spiral Grooved Multiple Hole 50 Sizes Step Drill Bit Set with Aluminum Case;

100% brand new and high quality
Use for home and industrial
Drop forged, heat treated, high-speed steel, fully polish
Take the guessing out of drilling by supplying the proper depth for you

√What we have?
#1: 7mm~35mm(1/4~1-3/8), 10 Step, 85mm(L)
#2: 5mm~23mm(3/16~7/8), 12 Step, 75mm(L)
#3: 7mm~20mm(1/4~3/4), 9 Step, 72mm(L)
#4: 4mm~13mm(1/8~1/2), 13 Step, 83mm(L)
#5: 5mm~13mm(3/16~1/2), 6 Step, 69mm(L)
#Box Size: 150x105x40mm

√How to use DRILLPRO HSS spiral grooved multiple hole step drill bit ?
â–¶Please mark the cross to confirm the center of the hole.
â–¶Use low speed to drill holes through the spiral grooves.
â–¶Then speed up the spiral grooves of the spiral grooves to avoid the running deviation of the ladder.
â–¶Used on sheet metal, sink, car repair, thin iron plate, aluminum, insulation board, PVC board timber thickness within 5mm.
â–¶Suitable for hand drill, bench drill.

√What to pay attention to?
â–¶While working on the side, water injection cooling can effectively prolong the service life of the drill bit, and recommend the drill speed of 250--400 RPM.
â–¶Please allow 1-3mm error due to manual measurement. please make sure you do not mind before you bid.
â–¶Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!

√Why Choose DRILLPRO
â–¶Good quality and reliable brand.
â–¶Within 90 days product quality is not completely satisfied, please CONTACT US, 100% refund.
â–¶24-hour feedback excellent customer service