Mydentity Perfectly balanced for ultra smooth cutting action. The geometry of the bit allows it to cut smoothly in either clockwise of counter clockwise directions, making them perfect for both right or left handed techs. The K-Star Carbide Bit Under the Nail Cleaner Silver is a straight thin shank shaped carbide bit. The carbide is cut into a plain shank with a new safety tip. You can get right underneath all those tight spots to gently bevel the undersides of the nails smooth without cutting the fingertip. Made for e-file machines with a 3/32" collet closing mechanism. Straight shape with a safety tip it comes in medium grit in Silver.