rigid shank

rig·id shank

(rij'id shank)
Larger diameter instrument shank to withstand pressure needed to remove heavy calculus deposits.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
All have rigid shanks that meet the DIN 6595/ISO 9766 standard.
* Buy shoes that fit and have shock-absorbent soles, rigid shanks, and some extra padding in the heels.