MK Diamond MK-925DSLX supreme grade silent core blade for hard materials. Silent Core diamond blades have a specialized core that reduces vibration and noise. Instead of the standard high-pitched whine, Silent Core blades are significantly quieter. This is beneficial on jobsites where controlling the cutting noise level is an issue and a quieter blade reduces the chance of hearing loss for the operator. Silent Core blades have two designs. The Sandwich Core is manufactured with two steel cores laminated with a copper center that provides the greatest sound reduction. The Laser Cut Core of the MK-925DSLX has epoxy filled silencing material that provides cost effective solution to noise reduction and suppression.