3Pcs Chuck Head 13mm 
. Material : Carbon Steel
. Size : 13mm ( 1/2" )
. Thread Size : 1/2" x 20 UNF
. Clamping Range : 1.5mm to 13.0mm
. 1 Pc 13mm Chuck Key
. 1 Pcs Sds Plus x 2/8" x 20UNF Adaptor
. It includes a keyed chuck head, a chuck key for tightening, and an sds plus adaptor for use with rotary hammer drills.
. The components are constructed from hardened steel to provide a secure grip and durability for heavy-duty work.