Superior Electric S2CKH Aftermarket Rubber Chuck Key Holder Replaces Milwaukee 48-66-4040 fits keys # 48-66-3080, 48-66-3240, 48-66-3280 Prevents key loss & Replaces Milwaukee 48-66-4040 Attaches chuck key to power drill cord Fits most brand names chuck keys and drill cords Fits Milwaukee Key Numbers 48-66-3080, 48-66-3240 and 48-66-3280 Comes in a clam shell pack