Set of 20 High Speed Twist Drill Bits in Plastic Stand Omega® 43.15 NN Exclusive grit and backing are

Exclusive grit and backing are designed for jewelry applications and provide exceptionally long life

Diameter of the wheel is 33

triangular stud screw to fit Jaeger LeCoultre® calibres: 489

Drill Press Adapter for Bergeon fits your drill press to take Bergeon reamers

It operates on one "AA" battery

Set of 20 High Speed Twist Drill Bits in Plastic Stand Omega® 43.15 NN Exclusive grit and backing areSet of 20 High Speed Twist Drill Bits in Plastic Stand Made of high quality steel, carefully tempered and accurately ground to size. All drills have straight shanks and are perfectly finished to assure quick, smooth and clean drilling. Sizes 61 (0. 99mm) to 80 (0. 34mm).