Jacobs 500 Series 1/2" Keyless Chuck + SDS Adaptor 

Steel Body High Performace Chuck 

Mounting Spindle Is 3/8 x 24 tpi and fits most of 3/8 (10mm) Spindle cordless Drills 

Positive locking mechanism prevents loosening in hammer applications. Anti-lock nut prevents chuck from locking open. Chuck capacity 1.5-13mm. Recommended for use with 18v and 24v tools

Comes without plastic blister pack 

Ratchet Locking System Technology

Jacobs Patented Ratchet Locking System inside - Great bit holding and prevents bit loosening under high vibration applications.


Click Technology

Provides audible and tactile feedback when chuck is properly tightening.


Anti-Lock Technology

Prevents chuck from locking open at max. capacity