Industrial and Scientific never disappoints and with the HHIP 5829 0187 Flute Double Center, I have found the perfect accessory for my milling needs. As a result of using this product, I found that the level of precision and accuracy in my work has improved significantly .The durability and build quality are remarkable, especially at this price point. The only downside I found was that the instructions were not very clear but it was easy enough to figure out with a bit of trial and error. Overall, I highly recommend this product!