This heavy-duty version of the H.30® handpiece is designed exclusively for Foredom® square-drive flex shaft systems. Perfect for heavy-duty work or any task requiring high speed, including woodworking and stone carving. Adjustable key-type 3-jaw #0 chuck fits shanks from 0" to 5/32" (0-4mm). Grease-sealed ball bearings require no lubrication; CK-0 chuck key is included. Includes a limited 90-day warranty.