Keystone I V-KEY-SL-71
Leg Extension
Inspire users to build and define their quadriceps with a Keystone Leg Extension that will fit your commercial fitness facility as well as it fits everyone you serve. From precise body positioning geometry to moisture-resistant cushioning to welded-steel frames, we designed every detail for performance, comfort and durability in tough, high-traffic fitness environments.
Comfortable, Familiar Motion
A refined cam profile matches the body’s natural strength curve to ensure smooth reps and consistent resistance throughout the full range of motion.
Supportive Upright Positioning
A naturally upright seated position and optimized seat angle help stabilize the user while allowing for the kind of targeted quadriceps activation that maximizes results.
Comfortable and Easy to Clean
Durable, moisture-resistant pads keep their shape and comfort even after years of use.
Smart, Simple Design
All our selectorized stations feature a low stack height for clean, open sight lines, plus space-saving back-to-back configurations, easily accessible open frames, non-slip storage shelf and device cradle.
Lasting Durability
Count on all our selectorized stations to withstand intense workouts and constant use thanks to oversized steel frames with robotic welds, reinforced pulleys, solid steel pivot points and heavy-gauge cables.
Instructional Insights
Large, bright instructional placards illustrate correct body positioning and use at a glance, while a QR code takes users to a short instructional video.
Specifications
Product features and specifications subject to change.
Adjustments
Color Coded Pivots & Points of Adjustment
Yes
User Adjustment Range
4-position range of motion
Seat Adjustment
7-position back pad (ratcheting adjustment), fixed seat
Frame & Cables
Frame Color
Matte Black
Frame Finish
Proprietary two-coat powder process
Machine Anchoring
Yes
Cable Transmission
Internally lubricated cables and fittings
Optional Kit
Rep Counter
Electronic counter displays reps and time with reset buttons
Rep Counter
Electronic counter displays reps and time with reset buttons
Incremental Weight System (V-KEY-SL-IW)
2.3 kg / 5 lbs.
Tech Specs
Overall Dimensions
133 x 104 x 155 cm / 52.4” x 40.9” x 61”
Max ”In-use” Dimensions
166 x 104 x 155 cm / 65.4” x 40.9” x 61”
Product Weight
239.2 kg / 527.4 lbs.
User Amenities
Contoured Seat
Yes
Instructional Placards
Muscle call outs, start and finish exercise illustrations, proper machine movements, QR code link to how-to videos
Upholstery
Double-seam stitched vinyl cover with wood-backed injection-molded urethane foam
Personal Storage
Tactile storage mats, personal device cradle
Weight Stack
Total Stack Weight
107 kg / 235 lbs.
Max Training Weight
109.3 kg / 240 lbs. including incremental weight
Weight Plate Increments
7 kg / 15 lbs.
Weight Stack Guarding
Full front and rear shields
Consistent Stack Height
Yes
Back-to-back Configurations
Yes
Color Coded Pivots & Points of Adjustment
Yes
User Adjustment Range
4-position range of motion
Seat Adjustment
7-position back pad (ratcheting adjustment), fixed seat