They lock securely in plwith just a half a twist, another half twist theyre off. Constructed on a YF weight, water resistant polyester cloth backing. Can be ran wet or dry Model # 051144-11000 Features: Abrasive Material - Aluminum Oxide Applicable Materials - Metals Applications - Grinding; Blending; Deburring Body Material - Cloth Bond - Resin Item Dimensions: 9. 71" L x 9. 13" W x 5. 08" H.
