8 Sizes for 5 in 1 Nail Drill From left to right drills, sizes are Triple Coarse-3XC to Double Fine-2XF. Triple Coarse - 3XC, Double Coarse - 2XC, Extra Coarse - XC, Coarse - C. They has big size cross cut teeth. They are suitable for hard gels. We recommend rotate speed on 15,000 - 20,000Middle - M, Fine - F: With this 2 sizes teeth, you could to remove soft nail gels. Recommend 10,000 - 20,000 speed.Extra Fine - XF, Double Fine - XXF: The teeth is very small and close. Speed on 10,000 - 20,000 to remove base gels. 3 sizes areas mixed in 1 nail drillFrom up to down, the sizes are changes to bigger and biggerFor example, the Double Fine-2XF, it contains 3XF, 2XF, and XF, 3 sizes teeth. R Cut, to do Smile LineTop Teeth, could remove small dotsDouble Hand Use, 2 way rotations 2 Way RotateDouble Hand Use Double Fine - XXF Mix with 3XF + XXF + XF Remove Base Gels Extra Fine - XF Mix with XXF + XF + F Remove Base Gels Fine - F Mix with XF + F + M Remove Soft Nail Gels Middle - M Mix with F + M + C Remove Soft Nail Gels Coarse - C Mix with M + C + XC Remove Hard Nail Gels Extra Coarse - XC Mix with C + XC + XXC Remove Hard Nail Gels Double Coarse -XXC Mix with XC + XXC + 3XC Remove Hard Nail Gels Triple Coarse -3XC Mix with XXC + 3XC + 4XC Remove Hard Nail Gels Extra Fine -XFDouble Fine -XXFRemove Base Gels Middle -MFine -FRemove Soft Gels Triple Coarse -3XCDouble Coarse -2XCExtra Coarse -XCCoarse -CRemove Hard Gels 5 in 1 Original, Big Barrel 5 in 1 Big Barrel & Cross Cut 5 in 1 Slim Barrel 5 in 1 Slim Barrel & Cross Cut 5 in 1 Pro 5 in 1 Mix Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Customer Reviews 4.5 out of 5 stars 312 4.6 out of 5 stars 257 4.6 out of 5 stars 250 4.7 out of 5 stars 518 4.1 out of 5 stars 61 4.1 out of 5 stars 61 Price $18.99$18.99 $19.49$19.49 $18.99$18.99 $18.99$18.99 $23.99$23.99 $20.99$20.99 Barrel Size Big Barrel, Dia. 0.28 inch Big Barrel, Dia. 0.28 inch Slim Barrel, Dia 0.24 inch Slim Barrel, Dia 0.24 inch Slim Barrel, Dia 0.24 inch Slim Barrel, Dia 0.24 inch Teeth Size 3 Sizes, 8 Varieties 3 Sizes, 8 Varieties 3 Sizes, 8 Varieties 3 Sizes, 8 Varieties 3 Sizes, 2 Varieties 2 Sizes, 2 Varieties Double HandSize Double Hand Use Double Hand Use, Right hand is better Double Hand Use Double Hand Use, Right hand is better Double Hand Use, Right hand is better Double Hand Use, Right hand is better Teeth Straight Line Cut Cross Cut Straight Line Cut Cross Cut Cross Cut Cross Cut Coated Original Color Original Color Original Color Original Color Titanium Coated Titanium Coated C & I Nail Drills are designed for nail remove. Professional E-File for nail tech or nail beauty hobbyist. You could use it in nail salon and at home.