Internal joiner for 1-1/2" tube

Internal joiner for 1-1/2" 16 gauge square tube. Made from 10 gauge tube and is therefore stronger than the material it is joining. A flat is milled on two sides to ensure an accurate fit and maintain register of the adjoining square tubes. Supplied with M6 bolts. Can be supplied undrilled for users who prefer to drill boom and joiner in one operation.