Mtech X-treme silver-stoken Practice BALISONG BUTTERFLY COMB Knife Trainer tool folded Titanium metal cover APromotion right now and we will raise the price anytime; This is a perfect one tool if you are a butterfly knives lover. You can practice without harmful. Opens hard and fast!!! You may use this to comb hair. Handle material: Metal construction; Handle material: stainless steel construction with Titanium metal cover; Overall Length: 225mm (8 8/10);Comb Length: 105mm (3 9/10"); Item Weight: 135gram (4.7oz) It is very normal if the screw is loose after the comb was played; that is why you need a screw driver;If the connection is loose or crushed when playing, just reconnect again using the screw driver.