Exquisite and professional workmanship makes it very sturdy and hard. Three different specifications allow you to choose the most suitable one according to your needs. The wide range of applications makes it very useful and practical to use. And the smooth chip removal makes it have high work efficiency. Made of carbon steel material, it is very durable to use. There are three specifications compatible you to choose from: 3-13mm Hexagonal Shank, 5-16mm Round Shank, 3-13mm Round Shank. It is suitable compatible taper hole on the wood board, wood sink holes, chamfers, inverted taper. Item Name: Taper Reamer Material: Carbon Steel Features: Widely Used, Different Specifications, Non-slip Product Specifications: A: 3-13mm Hexagonal Shank, B: 5-16mm Round Shank, C: 3-13mm Round Shank Size Details: 3-13mm Hexagonal Shank: Length: 12.8cm/5.04", Width: 1.3cm/0.51", Height: 1.3cm/0.51", Leverage Length: 8.5cm/3.35", Scope Application: 0.3cm-1.3cm/0.12"-0.51" (Approx.) 5-16mm Round Shank: Length: 14.4cm/5.67", Width: 1.6cm/0.63", Height: 1.6cm/0.63", Leverage Length: 9cm/3.54", Scope Application: 0.5cm-1.6cm/0.2"-0.63" (Approx.) 3-13mm Round Shank: Length: 14.1cm/5.55", Width: 1.3cm/0.51", Height: 1.3cm/0.51", Leverage Length: 11.1cm/4.37", Scope Application: 0.3cm-1.3cm/0.12"-0.51" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Taper Reamer 1 x Booster Bar