Wooden dowel pins are available fluted (multi-grooved) or spiral grooved. They help reinforce joints and support shelves with cabinet making projects as well as they are used for furniture joinery. These fluted dowel pins are a good choice as the flutes provide a way for the extra glue to escape as you insert the dowel pin. Dowel pins are also available pre-glued and are water activated. Conventional sizes start at 1/4″ diameter and metric sizes starting at 8mm diameter. Wood dowel pins are also available in custom sizes to meet your specific job requirements.