EAGNAS STAR Y12-3 model, cost $459.00, Tabletop Stringer All-metal linear ball bearing string gripper with spring clutch (ratchet) 2 heavy-duty stainless steel swivel clamps (PN-1003), Swivel clamp base with spring-action lever: Much easier to use and no muscle needed. Just need one-eighth turn to lock and release the base. Both head and throat mounting stocks vertically adjustable see at http://www.eagnas.com/portable.html#STY123 This adapted with an estringer electric tensioner cost $175, see at http://www.sptennis.com/stringer.asp#FL This electric combo works fast. I can string a racquet in 30 minutes. Email me for pictures. For pick up $375 or best offer. I could ship but it weighs alot.