Check the listing for details. TOOLCOOL Self Centering Dowel Jig Kit Woodworking Doweling Jig Creates Edge. Condition: Open box. Listed at 31.57 USD. This dowel jig kit is designed for creating edge, corner and surface joints, applicable for 6mm 8mm 10mm dowel pins. All-aluminum alloy construction, precision machined by CNC, anodized finish, no play no wiggle, solid and stable. Mechanical self-centering, no measuring no adjustment required, precise and easy to use. Allows to drill 3 holes one time without repositioning the jig, to keep the spacing consistent; Equipped with clamping device to hold jig in place to prevent movement for consistent results.