Feature:

*The compact set replaces individual 1 drill bits.

*Two-flute design for faster, smoother cutting.

*Suitable for workpieces with hardness below 25°, such as iron plate, steel plate, PV plate, and insulation plate.

*Use tools: both pistol drill and bench drill.

*Note: Water cooling while working can effectively extend the service life of the drill bit. The recommended drilling speed is 250-400 rpm!

Specifications: 

Product Name: Step Drill Bit

Material: 4241 High speed steel

Color: Gold, Silver

3/16-1/2 , 6 step bit: 3/16(4.76mm), 1/4(6.35mm）, 5/16(7.94mm), 3/8(10.35mm), 7/16(11.11mm), 1/2(12.7mm)

1/4-3/4 , 9 step bit: 1/4(6.35mm)，5/16(7.94mm)，3/8(9.53mm), 7/16(11.11mm), 1/2(12.7mm), 9/16(14.29mm),5/8(15.88mm), 11/16(17.46mm), 3/4(19.05mm)

1/4-1-3/8 , 10 step bit: 1/4(6.35mm), 3/8(9.5mm), 1/2(12.7mm), 5/8(15.9mm), 3/4(19mm), 7/8(22.23mm), 1(25.4mm), 1-1/8(28.56mm, 1-1/4(31.75mm), 1-3/8(34.93mm)

3/16-7/8 , 12 step bit: 3/16(4.76mm), 1/4(6.35mm), 5/16(7.94mm), 3/8(9.53mm), 7/16(11.11mm), 1/2(12.7mm), 9/16(14.29mm), 5/8(15.88mm), 11/16(17.46mm), 3/4(19.05mm), 13/16(20.64mm), 7/8(22.22mm)

1/8-1/2 , 13 step bit: 1/8(3.18mm), 5/32(3.97mm), 3/16(4.76mm), 7/32(5.56mm), 1/4(6.35mm), 9/32(7.14mm), 5/16(7.94mm), 11/32(8.73mm), 3/8(9.53mm), 13/32(10.32mm), 7/16(11.11mm), 15/32(11.91mm), 1/2(12.7mm）

Suitable for: iron plate, steel plate, PV plate, and insulation plate.

Quantity: 5pcs set

Package Included: 

5 × Step Drill Bit

Note:

1.Transition: 1cm=10mm=0.39inch.

2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.

3. Please allow slight manual measurement deviation for the data.

Payment must be completed within 5 days. If you have any problems about payment, please contact us via ebay message.

We only ship to confirmed ebay Order addresses. Please comfirm that your Order address is in line with your shipping address.

Please kindly note that the combined shipping is not provided because the shipping fee is calculated by weight. Also, the each additional item means exactly the the same color and size. 

It takes about 7-15 working days to US; about 10-30 working days to other countries. Transit time may be a little delayed because of the bad weather and customs inspection. If you do not receive your item within 30 working days since payment finished, please contact us immediately for further assistance.

We strive for 100% customer satisfaction! Positive Feedback is very important to us. If you have any questions, please feel free to contact us via "Ask seller a question" . We will reply your email within 24 working hours.