Porter Cable OEM Bases part# 904936. Compatible with: 890 Type 1, 8901 Type 1, 8901 Type 2, 891 Type 1, 891 Type 2, 892 Type 1, 892 Type 2, 892 Type 3, 892DT Type 1, 8931 Type 1, 893PK Type 1, 893PK Type 2, 893PK Type 3, 893PKL Type 2, 893PKL Type 3, 894PK Type 1, 894PK Type 2, 894PK Type 3, 895PK Type 1, 895PK Type 2, 895PK Type 3