4 CORNER ZIP CRANK™ HEIGHT ADJUSTER ZipCrank™ Goal Height Adjusters Easy-to-Read Height Indicator From adult to youth play in 60 seconds...ZipCrank corner mount rim height adjusters are designed to avoid reduced backboard and rim rigidity common with other height adjustable goal systems * Movable framework slides up and down on two chrome plated 1 " diameter rods riding in machined steel bushings * Height adjusters are installed between the backboard and the backboard support structure and when retrofitted on existing courts moves face of backboard 4¼ " toward the free throw line * May require minor field drilling on some existing retrofit applications * Adjusts rim infinitely from official 10' to 8' heights and includes easy-to-read height indicator labels * Operated with the hand crank provided or with optional BA931 Cordless Winch Winder * See chart below for ordering details including use on center strut structures * 5-Year limited warranty. Backboard Type 42 " x 72 " backboard with 4 corner mounts 48 " x 72 " backboard with 4 corner mounts Fan shaped backboard Other backboards with approximate 35 " (w) x 20 " rear mounting patterns Backboards that mount to single 6 " or 65/8 " diameter support structures Backboards on certain T-Rex portable backstops See page 6 and 8 for details Operation Options BA931 Cordless Winch Winder Kit Increase the ease and speed of adjusting Bison ZipCrank Goal Height Adjusters with this cordless, rechargeable winch winder * Kit includes cordless drill, battery charger and BA935 extension with ½ " square drive adapter drive rod. BA975KS Standard Manual Crank Operation Standard Manual Crank Operation Each ZipCrank Height Adjuster is supplied with one manual adjustment rod that allows easy up and down operation from the gym floor. Optional BA931 Cordless Winch Winder Operation BA935 ZipCrank Height Adjuster Drive Shaft Only (not shown) Order BA935 to raise and lower Bison ZipCrank™ rim height adjusters with customer supplied cordless power tool * Includes drill drive socket. 24 www.bisoninc.com Electric Key Switch Traditional key operated single key switch with cover...Up-Down labeled cover plate. BA980P Manual Operation BA980RS BA980RT BA980F BA980F See page 22 for adapters and consult a Bison Product Specialist 800-247-7668http://www.bisoninc.com